About a decade ago I spent a few years serving as a bull for hotwife and cuckold couples. I got started in the swinging scene with more standard mfm/mmf threesomes, but over the years my dominant side had started to come to the fore and I realized I really enjoyed taking an alpha role and having the woman entirely to myself while her husband just sat there and watched. The more anonymous the better, as it let me get out of my head and be someone completely different than I was in my day to day life.
At the time the best way to meet people was Craigslist personals (RIP). It took work, but a well written ad would get responses (and a lot of spam and scammers, but they were usually easy to sort out). I opened my e-mail one afternoon and saw a response to my most recent ad from a man named Dave. His tone was very submissive, and I could literally feel his nervousness through the screen. He said that he and his wife Jane were staying at the local casino this weekend (Turning Stone in upstate NY, if anyone is curious – although I no longer live in that area), and they were looking for a guy to come and fuck her the way she really wanted to be fucked, hard and deep, and rough, before filling her with a thick load of cum.