MFM threesome

Guys, if you have ever been in MFM, was it your idea? Her Idea? Just happened? (Answer for the first time if you have been in multiple MFMs).

I had sex with both of them individually before they had met. They got to talking, he outed me to her, and she wanted the threesome.

Me and a guy friend double teamed a hooker once. Only drawback was, she would only let one of us have at her at a time. So one of us had to sit in the corner waiting his turn until the other was done. But we both fucked her several times.