Typically, I only like my tit torture to be pretty mild. Unlike my husband (whose tits I can tweak to the point of bleeding–though I don’t make a habit out of that), I’m more for teasing and mild pressure. That said, once I got my Deluxe Custom Leather Sleepsack from Mr. S. with tit flaps, it proved a bit too hard resist a bit of play with them. We tried out some nipple suckers. They don’t make this particular model anymore, but you can get ones either at The Stockroom or Fort Troff (search for Twist N Suck).
To be honest, the pics look far, far worse than it actually felt.