About me: At the time of this story I am a 22 year old transgender woman, a recent college graduate, and a free-use slut for basically anyone who expresses an interest. I am 5’6”, white Hispanic, with curly brown hair to my shoulders and piercing blue eyes. I weigh 140 lbs of mostly lean muscle, as befits a multiple varsity athlete.

After I graduated college, I hung around for a couple months on campus. My job didn’t start until August, so I spent the time hanging with younger friends, smoking weed, and fornicating. It was a fun time.

One person I spent a lot of time hanging out with was a non-binary person named Sophie. Sophie was a rather sheltered person who I would introduce to a whole bunch of fun things, including sexual pleasure. As people with vaginas are want to do when they’ve only hooked up with men, they had thought that they just didn’t enjoy sex previously. At the time of this story Sophie is first year PhD student. They are 5’4” and maybe 120 lbs. They are pale with raven black hair and perky B-cubs. They have one of the prettiest vaginas I have ever seen.

Sophie and I had been talking about some mathematics related to their research, and I had offered to explain some stuff they were struggling with. I told them to arrive at particular lecture hall of the mathematics building at 2 am for their instruction.

Sophie shows up, a bit curious about why it had to be so late. I hadn’t told them my plan, though I had hinted that extending their sexual boundaries would be involved. When they came in to the lecture hall, my back was to them and I was writing on the chalk board. I was wearing one of my favorite dresses: a cute green thing covered in lemons that buttoned down the front. It was the only thing I was wearing, and it wasn’t buttoned.

They came up behind me and gave me a hug and a kiss on the neck, and then gasped as their arms reached around me and touched my penis. Although they had seen it before, this was the first time they had touched it and I had been subtly stimulating against the chalkboard to remain erect. It had the desired effect.

I turned, smiling warmly and gave them a kiss on the cheek. “Welcome! I said,” completely ignoring my nudity or the fact that their eyes were running up and down my body. “You had expressed interest in experimenting with your boundaries, so I figured this would be an excellent time to start. Wearing clothes is such a burden after all. Why don’t you kick back, relax, and I’ll get started on the talk?”

They had some qualms and fears, primarily related to people walking in on us, which we discussed and I eventually satiated. We agreed that we would both strip nude, but that we’d move to the side of the room where we weren’t visible from the door. There is a bit of an alcove that’s hard to see into unless you’re standing directly in front of it, and we positioned ourselves next to the alcove for a quick hiding spot if anyone was to come in.

To my surprise Sophie wasn’t shy at all about disrobing, despite this being the first time I had seen them fully nude. I don’t know if it was genuine or if they were in control of their emotions, but they seemed totally calm as they stripped in front of my and took my dress off my shoulders like a host removing a guest’s coat.

The lecture lasted an hour and a half, only once punctuated by an interruption. Some janitors had a conversation in the hall outside, and we stood frozen waiting to see if they would come in. Eventually we heard the knob turn and jumped into the alcove, holding still with our bodies pressed against each other as we waited for what seemed like forever. Eventually, the janitor left and we emerged and finished the lecture.

Afterwards, as a reward, I gave Sophie an orgasm. We had a bit of a joke between us that I was training them Pavlov style to be sex obsessed by giving them an orgasm whenever they were good or did something that made them nervous. While it was a joke, I did secretly hope it had that effect.

I offered to give them an orgasm on their advisor’s desk, but they declined and instead we did it in the lecture hall. I pushed a couple desks together an laid them down on them, before getting on my knees between their legs. This was actually the first time I gave Sophie oral sex, and they screamed out an orgasm into the empty math building with their legs over my shoulders as I ate them out thoroughly.