People have been boning on Earth since the dawn of time, literally everywhere they can. Folks bone on beaches, in aeroplanes, and even volcanoes -- you name it, someone's probably gotten off there. The only place humans have (probably) never banged in is space, which, to some, makes it the final frontier of sexual conquest. Microgravity sexing is an idea that has inspired countless movie moments, but with bonafide space tourism approaching as early as next year, it isn't inconceivable that couples will try to enact their fantasies for real.