Forgive the thread necromancy, please. I got a pair of the Mr. S. Leather tit suckers, and have used them a few times already. I gotta say, I love the sensation! Not only do I stay hard the entire time I've got them on, no matter what else I'm doing (I'll do some "nipple therapy" and just apply them, then sit back and read a book or some other relaxing activity), but I'm more sensitive and my nips stay hard for hours afterwards. It's truly a wonderful experience, and I've played with a couple friends with whom the nipple play was a lot more fun after using them, too! Definitely a worthwhile investment, even if the change doesn't turn out to be permanent, I can use them again and again, so it's all good.