Yes, I slept with one of the women in HR (I know, ironic). Started with some flirting and ended with a couple of really hot sessions at her place.
I was 25 when I let an older coworker talk me into stripping for him, then letting him jack me off. The next thing I knew, I was letting him watch me shower and jack off for him while he jacked off. Within just a couple weeks, I was stripping the minute I walked into his house and he was swallowing my cum like he lived on it. He was the first person to suck me to an orgasm, the first to swallow my cum, and the first to lick my ass hole. He was the first man I ever kissed and his was the first cock I ever tasted.
Weirdest story I have about co-workers. I have never, ever had sex with a co-worker. But my first day on my current job was a manager's retreat and one of the people I met there was the accounting manager (now our controller). And danged if I didn't have a wet dream about seducing her in her office like that night or the next. She was 30 when we met, now in her fifties and still pretty attractive. We are good friends after working together for most of my 27 years with the company (she was off a year for mat leave at one point). But no affair nor is one likely at this point.