Who they have body chemistry with, how a man moves his pelvis with a better rhythm. A man that does not take all day to come and go jackrabbit on them with no rhythm, you shouldn't be shaking the bed and start pounding until you are just about to come. It's like singing if you start off on a high note you screwed up the song. You build up to intensity. Stop changing up the position every second and repeat what you see done on a porno flick. Be a good kisser, no wild tounging. No spot licking, lick all of what you are licking. Do not point your tongue like a dart, lizard licking, do wide tounge like a dog unless you are targeting that special spot.