There are two schools of thought about this (do a search for 'friends'). Some think that (and it really depends on the person/people) it's okay while others (us included) think that the risks far outweigh the benefits. If anything goes wrong...bad blood, he falls for you, things just go south, are you ready to lose his friendship and for your friends/family to hear about what happened? He also might not be interested when the offer is made. If you are SURE that the friendship is strong enough that bad things won't happen, then it's up to the two (three) of you. Otherwise, with how many guys looking to swing with couples, it's just easier to find someone who doesn't know your friends/family. Either way its up to you, only you know all of the details. We would rather make friends out of swingers than swingers out of friends.