Has anyone ever bet or negoitiated if with their spouse for a specific sex act? For example, I'll let you go to such and such if you give me a blow job later or something like that?

It's always been a curious idea to want to try, but seems like a direction I'd not want my marriage to go, but perhaps once in awhile...thoughts? (Incidentally, I'm not lacking for the things I want in the bedroom so maybe that is where my lack of push comes from etc).