Got my first one Tuesday and couldn't wait to clamp it to my tit. I couldn't close it on the nipple--the nipple's too big--so I had to clamp it on a little further back. OMG!! I've never had anything hurt so good. I'll be ordering another one soon. I need to have one hanging on each tit. (Feels good clamped to my clit, too. OUCH!!!)