I confess most of my fuck buddies this past year have been either in a relationship, engaged, or married. I've never cheated on any girl I've ever dated, but have been that guy that girls cheat with many many times. I don't feel bad about it, they always make the perfect fuck buddies. You get all the sex and none of the relationship issues.
At the moment I'm fucking this hot little piece that's engaged to some douche that she hasn't fucked in like a year. She's like 5' and 100lbs, and loves getting railed hard while I tie her up and slap her. (pic related)
I've also started messing around with another girl that's married. She's from outside the US and is very self-consious of her body, due to her upbringing in her country. We started as friends, I've even hung out with her and her husband a few times. Then things escalated and before I knew it she was sucking my dick in my car. We recently just had sex, and it was pretty boring since she's all self-consious, but she's smoking hot which is why I continue. And she's got great tits.
I think I may be developing a complex for taken women. I have plenty of stories.