although I'm not bisexual, here is an experience I had with humiliation sex:
Over the years I have patronized many masseurs, but this guy was special. I started going to him and his massages were very good, but there was not a lot of sexual touching going on, until we started talking and I admitted that I liked to be ordered around and he admitted that he liked it. So, gradually things began to get more and more daring. It culminated in sessions where I would go over to his house, walk up to the massage room on the second floor, which was dark, except for several large candles burning. As we entered the room, he took off his robe and was just wearing a jock. He always pulled me over to the chair next to the massage table and told me to strip while he watched. After I was naked, he blindfolded me, pulled me to him and we began deep kissing. Invariably his hands would wander to my ass and he would begin playing with my hole. One time he stopped and said, " You've been giving this away to other guys. I though I was the only one who got your hole." I told him I was not bad, but he bent me over the massage table and began eating my ass, saying that he could tell that other men had fucked me. As he was eating me, he would slap my ass, causing a real sting. I eventually crawled onto the table on all fours, allowing him a greater access to my hole. After he had lubed it up, he proceed to thrust his cock inside me, saying," This is my hole. Are you going to give it to anybody else?" He proceeded to fuck my brains out and pepper dirty talk throughout, all the time slapping my ass until it was really red and stinging. I loved it. At his orgasm, he thrust the hardest and I screamed. He pulled out and said that that would teach me not to give my ass to anyone else. Then, we would proceed with the massage. The fucking was guaranteed to relax me on the table. This continued each time, with a little variation to keep it fresh. Once I admitted that I had given my ass to three other men. This led him to a prolonged spanking session and a real intense fuck, which included verbal humiliation. I wish he were still in town. What I'd give to once again be spanked, fucked, and made to feel like a total slut. I found out my fuck buddy had also been to him a couple of times, but no sexual activity had ensued, which made me feel vey special.