My first job (high school/college) was for a fast food restaurant. One of the managers was very gay and very out. At the time, I was very much in the closet. One summer, when I was in college, a group of coworkers were going to meet at a coworker's apartment. We were going to spend the day drinking by their pool. The gay boss had asked me to give him a ride. When I went to his apartment, he wasn't ready and got naked in front of me to take a shower. I had been working with him for about 3 years at this point and I wasn't attracted to him. But when he came out of the shower, he was naked and he pulled down my swimsuit. He started sucking my dick. I was 19 and would get an erection for no reason, so it got hard instantly. He then pushed me on to the bed and sat down on my dick. He rode my dick until he shot his load on me. He got off of me and handed me a towel to wipe up. I was still in shock over what had just happened. We hung out with our coworkers at the pool, but I was still in shock and ended up leaving after a few hours. We never talked about what happened and we never did anything sexual again.
The other time it happened was when I went to work for my boyfriend. He was the manager of a grocery store and was desperate for help. At the time, my father had died and left me a bunch of money. For the previous year, I had been working part-time first at the adult bookstore and then later at the gay bar. I was bored and needed something to do. So at first, I just started doing basic tasks, helping him out. But eventually I was working there full-time. We were having sex pretty much every day while we were at work. We used an abandoned back office which was very hidden. We almost got caught twice, but nobody ever found out.