friends with benifits

do any of you have this? me and the wife have been openly talking about this and are ok for the other to do this if we want. i have found one friend that i would like to also have this kinda relationship with. how do you go about bringing something like that up? we joke around a bit about sexual things, but thats as far as it goes. i havent even tried to go further, but how do you say what you need without risk of killing everything??

Ask her if there's a guy-friend she would ever like to bonk.

If your wife knows this gal, maybe your wife could bring it up.
I've found that doin' handyman stuff is one Hell of an icebreaker! I've gotten dinner and some damn good luvvin' lotsa times just for installing an outlet or replacing a water heater...mounting an A/C unit, you name it.
Maybe give it a shot.