"Oh, Vinny!" she giggles playfully, thinking about how innocent his question is "Well, sometimes I'll see my girlfriends when we don't have our tops on at the pool or something. Their nipples can get hard too, like this..." She takes her hand out of her skirt and touches one of her own nipples, making it easy for him to see~ "...and they can be a different color than the rest of their skin. It's just part of how our bodies work."