During blowjob, do guys usually move their waist back and forth or they leave the whole work to girls?

A little bit of thrusting is normal and almost expected, personally, haha, especially toward the end. It's one way to tell how much they're enjoying it. I feel kind of weird when a guy just lays there, unresponsive. I LIKE knowing that he appreciates what I'm doing and wants more of himself buried in my mouth. =P I can't speak for other girls, but I like the thrusting, I like feeling their hands in my hair, and even when they hold my head down.

My guy usually always thrusts. I love when he does because I can tell how he wants it. He thrusts faster when he wants it faster and slower when he wants it slower. Sometimes I'll lay down and let him do all the work, that way he gets it just how he wants it.

Not usually, but sometimes they do. I think it's hotter when they do because they're acting like a real person, not some statue.

I've had it both.Some guys like to just lay there,but others like to thrust back and forth,which I think is really sexy.I especially love it when the guy grabs my head,and and works it back and forth,while he's thrusting a "F's" my face.

the my guy kinda thrust into my mouth while I'm sucking on him.. but that's really intense and he usually doesn't usually do that until he is about to cum.

emm to be honest I've never had a guy move at all . They kind of just leave everything to me .

It depends.. If he's standing up, he thrusts. If he's lying down, he is still.

I've had both.

I can only speak from my experiences, but I have never had a guy not move.