Pelvic Thrust Syndrome

The phenomenon of the pelvic area suddenly becoming it's own being and thrusting towards an extremely hot person.

Friend 1- Dude, look at that guy, he's SO hot!
Friend 2- I know! Uh oh, I think I'm getting the Pelvic Thrust Syndrome!

Friend 1- Oh no! Restrain yourself!
Friend 2- It's too late! HELP!