I read you question and it's not specific so i guess my response fits. I see many great answers and have done most if not all of them in the swinger thing. The shortest however would be less than a minute . That would have been on more than one occasions where i pulled a train. One out one in, some never say a word. Others do introduce themselves. Some talk the whole time, usually asking have you done this before and almost always "what's the most guys you've fucked". Guys always ask that, i don't ever recall asking any guy that question though a few have shared that with me.