Kink.

All of these are celebrity couples that had a little kink they liked to explore with each other.

#1 – This sometimes A+ list mostly movie actor who is probably in a franchise still if they ever decide to make another, enjoyed having his now ex-wife who is a B list celebrity of celebrity offspring use a toy on him. He liked it best when she wore the toy.

Antonio Banderas
Melanie Griffith

#2 – This couple also consisted of a celebrity offspring and his B list actress significant other who has been in two long running television shows. She has not done much since the second went off the air. His favorite thing was to have his actress significant other watch him with other men.

Ashley Hamilton
Shannen Doherty

#3 – This foreign born B+ list mostly movie actor is an Academy Award winner/nominee. He has been married multiple times and each time he would cheat on his wife because of his need to inflict a great deal of pain on them. The guy is a sadist and apparently his new girlfriend was a professional sub which is how they met.

Gary Oldman
Alexandra Edenborough
Uma Thurman
Lesley Manville
Donya Fiorentino

Source: http://www.crazydaysandnights.net