What's the most anonymous sex you've ever had? Total stranger, and you never do find out his/her name.
Me-
Half drunk sex in the alleyway, or washroom. I stand up, pull the back of my skirt up, my panties down. While he puts on a condom I apply some lube, and he just sticks it up my ass. Right after coming, he can zip up, and go. Only happened a few times.
I have casual sex almost every week at a swingers club. Sometimes I literally grab a guy by his dick, and lead him to a mattress. I remember some names, not others.
An anal gangbang.
Back in high school I had sex almost every day, sometimes more, in the washroom at school. They were schoolmates, and I knew who they were, but that didn't matter much. I don't think they cared either. A teenager will fuck a rye bread. Bless them.
I gave a handjob to a guy in a coffee shop, right at the table. He came on my leg, and I didn't notice all the way out to my car later.