I had a girlfriend who fucked her lecturer in university for 3 years while we were together. She didn't hide it but were very honest and open about it. He was double our age. She didn't do it for grades but rather because of his dominant personality. I thought it was very hot.3somes with her last husband, except he didn't participate, he just had her fuck his friends. And in High School as a senior fucking one of her teachers regularly. She fucked the same guy again, regularly, some 27 years later during our marriage LOL. It was my idea, we did play with others, but it ended up leading to the divorce.