When hes cumming.

What do you do after he has ejaculated. My man keeps trying to pound but the strokes are really slow, then fast again its kinda all over the place and im on top wondering wtf to do, i sit there and hes trying to move me, if i move even slightly he freaks out and keeps saying "oh no oh no stoppp". Do men need you to just stop completely once they cum? What do you do?