No but on my sex bucket list. I want to do it with the wife and the guy fucking missionary and I lick his ass while he pounds her pussy. I would also like to rim a guys ass while the wife sucks him off.
I'm interested in this direction, but I can't yet imagine how to do it so that it's comfortable for all of us. For now, we're limited to her husband licking my balls while I fuck her from behind. If anyone has a suitable position, please share.