For me is when I was younger. My ex started fucking one of my friends when I’d go out with my buddies. I found out when he told another friend and he told me.
I was immediately turned on and I asked her while we were fucking if she would talk about it and she did. I eventually went out more and she would hook up with him so she could tell me about it. Everyone knew she was fucking him but I didn’t care. It was a big turn on.
I did manage to see them fucking when they thought I was out. I jacked off and came very hard. I tried doing a threesome with him but she would chicken out. This went on for about a year.
I was hooked but it progressed through other relationships. I wanted more and more. So naturally I was attracted to women who were known to sleep around. I felt more comfortable being open with them as they related to being sexually active.