I ask this even in a non-sexual context.
A common example I deal with:
I'll be sitting on my couch, and I'll pat the couch next to me to indicate the girl should sit there. She'll sit down...two feet away.
This typically leads to me raising an eyebrow, leaning over, picking her up, and scooting her over next to me -- or just straight onto my lap since she's making me work for it. Or, if a girl's legs are where I want mine to be and we're sprawling out, I'll just lift their legs up, rotate them, bend them, etc, put them wherever I want them.
Most Helpful Girl
There's something about guys moving you around or picking you up or whatever (in a positive way, of course) that makes you feel girly. A lot of girls are self-conscious about their weight and it's reassuring knowing a guy can move you around. My one friend is a bit bigger and her muscular boyfriend "throws her around" in the bedroom all the time and she loves it...if only for the fact that it doesn't make her feel heavy.
Plus, for some reason it's pretty much an instant turn on when a guy picks you up or moves you around (at least for me). It's a reminder of sex and what he can do in the bedroom.1