Guys who "offer" their wife or GF are going to be very unsatisfied with it all. When it's over you'll wonder why you did it. Watching her with a guy SHE chooses will be hundreds of times more erotic and pleasing for all three of you. It's one thing to plant the seed with our wives, but unless she's into the guy, it's just not 'gonna work out. I'd much rather watch my wife seduce a guy than force her to do the deed with some guy we don't know.