I wish I was Uber-rich so I could F'ck in Zero-G. It's got to be unlike
anything you've EVER experienced before. No springs to bounce on. No gravity to aid the pumping motion.... It would be totally "backwards."
You'd have to wrap your ankles around her and lock them and use a LOT of extra muscles to "pull" yourself into her..... >Sigh<
TOTALLY new positions\mechanics\physics not found in the Kama Sutra.
Then when you Cum you'd have to have your hands on her shoulders (ready) and push her the fuck away FAST so you could escape your own Jizz!