Your Girl Volunteers Your Balls

I read this story once where a guy's dominant girlfriend loaned him to her friends and they had their way with hits nuts over the course of the story for different sessions. Ie. They won the rights to him in a bet, she volunteered him during "games", etc.

Has that actually happened to anyone here? Even if its not to the extent of that scenario but more of a "here now you try"? Where maybe your girlfriend allowed someone else to kick you in the nuts and she's the one that volunteered you, or if you're in a situation with an actual dominatrix and she's "given" you to another?