ride point

Refers to a the actions of a designated member of a giggle of horny chicks who "travels at the front" of the group and "tries out" any well-endowed stud whom they happen across; she "rides his point" first to see how he is in bed, and then if she is pleased, she gives the approving nod/thumbs-up to her fellow "troops", and then these other cock-hungry gals "follow forward" and have a rip-roarin' good time with said hot hunk themselves.

The only problem with your letting someone else ride point is that often this other voracious chick will totally exhaust any new guy whom she "puts through his paces", and then the other gals in her group will hafta wait a good while before the dude is rested/recovered enough to give any of them a turn with his guy-junk.