I can imagine Joe the first time he has a real conversation with Seven "I don't mean to be forward young woman, but at some point in the future you are going to travel back in time to before Voyager is lost, and we are going to meet, I will be handsome and charming, and you will feel compelled to submit to my every request until we have a night of unbridled passion, but you can't allow yourself to do that, do you understand me? Timespace will break if you rip your clothes off and present your bosoms to me, because you didn't. It can't can't happen even though every fibre of your being will try to draw you into my embrace, for the Universe, for the integrity of reality you must fight your natural compulsions to ride me like a wild bronco or the universe is doomed. Can you do that? Can you not sleep with me? I know this is probably the hardest thing anyone has ever asked of you, but this is the right thing to do. Good. You will keep your clothes on and I will keep my clothes on and we must not kiss or it will all end in tragedy! i am serious! You are not allowed to kiss me! it is forbidden! ...However here and now, that's not an issue, and if you do the math, you owe me a raincheck for putting off the greatest emotional awakening of your life 5 years ago... But you'know, no biggy, one way or the other, I'm not extremely invested in seeing you naked, we should just be friends, if you can resist a bracing encounter with ultimate pleasure that is. Completely your call."
And then she would say something like "Arn't you married?"