Back in college, my friend [20F] introduced me [20M] to the wonderful world of pharmaceutical testing. I was apprehensive at first, but I didn't realise most of the drugs that were tested were just supplements and over the counter medicines, and were almost completely safe and the tests paid ridulously well. Just chugging a couple of pills and writing a few surveys and bloodwork were all that it took to make enough to buy the new iPhone, go out for fancy meals a couple of times a week- really whatever was well beyond the reach of a regular college student riddled with debt.

I was a few months into this space when the two of us discovered- on the bulletin board- "Test subjects wanted: Experimental drug to boost sexual performance. Sexually active heterosexual couples to apply." This was from a very large, well known pharmaceutical company, so when we read what they were willing to pay- our jaw dropped. This wasn't iPhone or Olive garden money- this was a hot tub or a new car kind of money.

"Oh man! I wished my boyfriend was here, we could have made a fortune on this", she said- she had a boyfriend who attended college at a different state. "Damn, I wish I had just anyone at all to participate in this with." I said.

We didn't talk much about it, but the following day she came up to me and said, "Dude, this is way too much to pass up. You want to do this study with me?" she said.

"You kidding?" I said, "we're not a "sexually active couple"", I said, airquoting.

"Look, 50-50 we get a placebo, and we don't even have to do anything. On the off chance we get the drug, we'll just get our stories straight- and make up some answers. Think about the money, this is more than we could make in 10 drug trials."

While being really concerned about the massive fraud we were about to do, the money was just far too tempting to let the opportunity go. We signed up for the trials. They gave us a screening survey- whose answers we collated, and next thing we knew- we were in.

We were emailed about a facility to visit with a long list of tests that we needed to get done- bloodwork, vitals, STD checks, ultrasounds and whatnot. After everything was cleared, we were personally escorted in what could only be described as an interrogation room inside a laboratory, and a guy in white coat handed us a box, and a clipboard with a four page document.

The document was far more detailed than we expected. It had rules for the experiment process. To summarize, these were the rules that stood out:

-The box contained two sensors for both of us- one to be worn at the wrist and looked like a smartwatch, and the other to be worn at the hip. These must be worn at all times, and they contain an array of sensors including motion, orientation, and their proximity to each other. There weren't any video or audio recording devices in them for our privacy. They were waterproof and would be secured with a non removable belt. -We were encouraged to have sex as much as we wanted, but we shouldn't force it. However, it was recommended that we try to have sex atleast once a week. -There would be absolutely no masturbating or use of toys such as vibrators. The devices would pick up these movements or vibrations and beep if they detect something was wrong. The same way, we should not have sex with anyone else during the study.

Twice a week we would have to check with the facility to answer surveys.

This was going to be much harder to fake than we had predicted, but we were too far along to get out of this. We signed the document, and the guy in the coat handed us a bottle of pill for each and a leaflet of contraceptives to her. "You need to take these once a day after dinner, roughly at the same time. Contraceptives are not mandatory but we highly recommend this to avoid lawsuits"- he chuckled. "Erm, yes- so, the drugs may be the pills, or placebo- you guys know the drill- we actually selected you because you guys did great on your previous drug trials." He smiled. "We do weekly bloodwork to test the presense of the drugs in your system."

We became very nervous as we prepared for the study. She came over to my place one day for us to discuss.

"How do we fool this? They are going to take the data off the sensors." I said,

"Okay, how about this? How about we- dry hump. The sensors will still read it as sex and I won't be cheating, right?" she said. She proceeded to spread her legs on the couch. I went ahead and proceeded to "hump" her. The drugs had started to get me fairly horny- I could sense they weren't placebo after all. I had a huge bulge in my pants and my pants rubbing against her turned me on more than I hoped. We proceeded to hump for a while and then we settled down on the couch.

"You think that was convincing enough?" she asked. "Honestly, I don't think so." I said.

Two days went by and I was feeling more and more horny. I got turned on by the smallest suggestive cue, and the fact that I could not masturbate was getting too much to bear. That day, we proceeded to do our dry hump routine as usual and I could see that she was pretty turned on as well. She started to touch her breasts and softly moan. I had been holding on for quite a while right now, so in a couple of minutes, I felt like I was going to cum. I rushed to the washroom and dropped my pants and let out ropes and ropes of cum. I cleaned up and wore my pants and came back to the hall to see my friend with her pants by her side, humping a pillow. She gestured frantically with her hands to leave her alone and went to my bedroom but I could hear her moan louder and louder till I heard her cum.

We were beginning to doubt whether we did a good job simulating sex, but the surveys that week made it pretty clear- we didn't. The surveys had intimate questions like "Did you feel your partner's vagina was more lubricated.", and "During sex, did you feel your partner's vagina was- A. tighter, B. looser, C. the same, followed by a level chart." There was no way for me to know this, so I did a little bit of guesswork. Then we were called in and asked why we were apart when we both achieved orgasms- apparently this was picked up very well by the sensors.

We got very anxious that we would be called out as frauds if we kept this up, so for the next session we decided we would take turns getting naked while dry humping. She went first and she took off her pants. She was wearing red lacy panties which showed off her clean bare pussy underneath. She got on the couch and spread her legs. I got down to my boxers and we started our humping. I had the hardest boner I ever had in my life and as I thrust myself at her pussy. I put my hand down to touch her panties and I could see it was soaking wet. It began to hurt inside my boxers, so I said, "Okay, I am going to pull down my boxers now.", and dropped my pants. I felt my dick grow to the biggest it had ever been and I rubbed against her panties. She lifted the flap of her panties and rubbed my dick against her pussy, starting to moan. "It's not cheating if you don't go in now, isn't it", she said.

As I rubbed against her pussy and we both got horny as we possibly could, it was just a matter of time before my cock slipped into her wet pussy. Soon I was balls deep into her clapping away at her pussy. The pills were working like magic- we fucked for almost half an hour, and she she was still wet and I was still hard and going. I saw her orgasm after orgasm as I fucked her raw. Finally I had to take a break to catch my breath and I sat down on the couch.

"You know, there's something I was curious about." She said, "I peeked at some documents about the drug, and it said that it increases semen taste and volume. Do you think that will be on the test?"

"I guess, we should be prepared"- I said.

She got down on her knees and got to sucking my dick. She was 10 minutes in when I finally came- and- as advertised- I could see heaves of cum pumped down her throat. She swallowed it down and said, "dang! that almost tasted sweet."

After that day we both decided that if we fucked for science- it wasn't really cheating now was it? We decided to run our own experiments. We kept count of how many times we fucked, and measured our performance with a stopwatch. She sucked my dick as she woke up from sleep to see if my semen tasted better. Eventually we got more and more adventurous till we led completely free-use life. We stayed naked around each other as much as we liked and we could fuck each other whenever we wanted. I got used to waking up with a sexy woman on top of my morning wood.

Finally the two glorious weeks of "experimentation" came to an end, and we submitted our results. The man informed us that we had indeed received the pills. He gave us our big payout and two weeks more of pills of lower dosage to wean us off the effects.

"So, if the pill is successful", he said- "you should have this level of sex drive for atleast a few more months."

We both looked at each other with sex-crazed eyes and sprinted to the lab washroom as the guy left.