The nipples are drawn pushed inward instead of sticking out, so the areola looks like it has a little dimple or hollow. Scenes often linger on close-ups where rubbing, sucking, or pinching makes them pop out or stay tucked in, adding a small “weirdly hot” detail during sex or foreplay. It usually shows up as a body-type quirk rather than a whole kink, but artists still play it up with teasing touches and nipple torture.