I generally like them to be sucked, licked....no biting....ouch. They are kinda sensitive (not sensitive for me, but sensitive to the touch when somebody else is playing with them). Also, I love to rub a girl's nipples with my index finger, flick them, suck them, pull them, etc. Nipples are such a turn on and great fun

. Nothing like a pair of perky nips, IMO.