Having sex in space would be interesting. I mean what else is there to do? You can't go anywhere.
Well, scientifically it goes way beyond the 'Imagine the positions without gravity!' That's why people have always wanted an answer... Has it happened? The response has so far been a nod and a wink, implying yes. But unfortunately our sensitivity makes research a big scarlet letter, even sex in space with married couples.
If we are to become space faring, though? Can impregnation occur in zero gravity? What effect does no gravity and radiation have on fetal development? Questions that need answers, but they can't even admit people have had sex in space in today's climate.