Guilt-Free Three 

The list of three celebrities that an individual is allowed to screw without receiving shit from his/her significant other. It is not likely that a person will ever need to employ the Guilt-Free Three, but it should be discussed in every relationship. Just in case.

Honey, I know you're not happy that I slept with David Bowie, but you really can't complain. I told you ages ago that he was in my Guilt-Free Three.

Guilt-Free Three by Lard Boy August 5, 2007

Guilt-free threesome

When your girlfriend sucks a wall-mount while you fuck her from behind.

Joe: You and your girlfriend had a threesome? Wasn't it awkward?
Todd: Nah, man. It was a guilt-free threesome.
Joe: Ah. Can't feel jealous of a dildo. You should invite me next time.

Guilt-free threesome by Gert G October 8, 2013