I was a student at an abnormally long (9-day) scientific conference at a resort in Puerto Rico. On the first night, a group of us organized a bioluminescent bay excursion. I met a really cute girl and it was practically crush-at-first-sight. I still remember exactly where she was standing when I saw her. It’s frozen in my mind. She was exactly my type - short, petite, with long brown hair, fair skin, and a round face. She was originally from Spain but raised in the US. And like everyone there, she was smart. She studied spiders and had a cool internship where she gave them drugs to see what kind of webs they spun when on acid.

We clicked immediately and over the next few days were joined at the hip. We sat next to each other in all sessions, ate together, did excursions together, etc. We had terrific chemistry and were constantly laughing. The only catch was that she had a boyfriend back home. Normally that’s a solid deal breaker for me. Once in high school a girl I had been crushing on for YEARS invited me over while house-sitting and literally led me to her bed. But I turned her down because she had a LD boyfriend at the time. Similarly, I put up some walls with this new friend.

But of course 9 days in a tropical paradise can break down even the strongest of walls. One evening we were on a balcony watching a lightning storm in the distance over the ocean. It was incredibly romantic. My mind kept roaming to a fantasy of having sex with her in one of the secluded dark benches they had below the balcony (really, what else were they there for!). But I resisted any moves…

The next day we were in the hot tub (with lots of other students). One girl who was married was drunk and blatantly hitting on a very attractive guy in our group. It was annoying to us all, but also pushed my mind away from sex with my friend. At one point, she told me her laptop was broken and asked if she could use mine to send some e-mails. I said “sure, come on up”. She gave me a very strange look. Her face suddenly got serious and she made strong eye contact with me. I remember it clearly. Later she told me that she took my invite as meaning to have sex. But at the time it was totally innocent. LOL.

I remember going up in the elevator. She wore a bikini and was covered in a towel. I always have a thing for women with wet hair. We got to my room. I led her to the laptop and sat on the bed while she worked.

After a minute she said she was done and sat next to me on the edge of the bed. By this point, I was turned on and had told myself that I wouldn’t make a move, but I’d let things play out if she did. She looked at me and my plan went out the window. I just knew I had to kiss her. It felt like the most natural thing in the world. So I just did it. She opened her mouth and kissed me back.

I grabbed her arms and gently pushed her towel off. While making out I looked down at her beautiful petite tits under a pink bikini top. I reached up beneath the bikini to fondle them and pushed her top up and off. I pushed her back on the bed and straddled her. I only had my bathing suit on and it was barely holding in my erection. I pushed in to grind it on her pussy. We made out and dry humped for a long while. Eventually, I pulled both our bottoms off at the same time. I couldn’t wait any longer. This was a tropical fantasy come true. I fingered her pussy gently to get it good and wet. And then I entered her, pretty slowly since this was our first time together. I started thrusting, but being pretty young I was going to cum too soon. So I paused for a sec.

I don’t think this was doing much for her. I was young and vanilla. So she took the initiative and flipped us over. She then reached down to mount my dick. This was the first time in my life a woman had ridden me. She told me to “Just lay back and enjoy”.

And I did. She grinded at first and I got to see those wonderful tits bounce, which has been a turn on ever since. She then leaned over me and moved back and forth, up and down my body. It felt great... She kept whispering “omigod” over and over again. She started cumming one after another - a long series of small convulsions. I don’t say this to brag, because I was doing nothing. She did all the work. I just layed there. I finally got too turned on and had to participate more. I started thrusting upward to push my dick deeper into her pussy. Eventually I came inside her (I knew she was on the pill, but still should have used a condom). She stopped afterward and unmounted me. We cuddled and had a long, normal conversation about life - as if we were just sitting outside with our friends.

She said she wanted to shower to get the chlorine from the hot tub off. The hotel room was weird. It was a large, loft style room with only a square, all-glass shower separating the bathroom from the bedroom. We took the shower together, but no sexytime. We washed each other, but nothing else. We went to sleep, each back in their bathing suits.

Before sunrise I woke up and noticed she was in the shower again. I don’t know why. It was steamed so I couldn’t see everything, but I could see enough to get super turned on. I decided to join her. We made out some more. Then she got on her knees and starting blowing me. Up until then I didn’t have a lot of experience with BJs and never came close to climax. But at one point I opened my eyes and looked down at her. My dick was fully in her mouth as she moved up and down. It was like a lightning bolt to me. I instantly went from a 3 to a 9 on the orgasm scale. It was soooo hot! I grabbed her head and started face fucking her. Right before climax, I pulled out and came on her tits.

We had a few more days at the conference. She basically moved into my hotel room. We didn’t fuck like rabbits, though. We did it maybe once a day IIRC. But we talked all night and took constant showers together (no more BJs though). We held hands outside the room. People stared and I got a couple of head nods, but we weren’t the only couple to hook up at this conference. There were quite a few people as inspired by the locale as we were.

When I went home, I felt a sense of sadness. It was odd. Eventually I realized it was the same feeling you get after a breakup or a romantic rejection. I think I really fell for her and was feeling it. She barely spoke about her BF during the trip, only to say he was in a band “that sucked”. She also told me I looked like one of her previous boyfriends who broke her heart. (girls, is that something you do? I’ve been told that a few times by a girl when flirting. Is it in the girl’s book of moves?) We talked about flying to see each other - but we were both too poor. We then said we’d continue this at future conferences. But my research agenda changed and I never attended that particular conference again. She’s now a high powered PhD scientist in that field. We never saw each other again.