Fetishes are often about transgressing social convention and playing around with taboos. One of the things we as a society have developed some serious taboos regarding is, unfortunately, our own bodies - particularly the bits of them that grow hair and make smells! Naturally, then, there are some people for whom the idea of armpit licking, sniffing or even armpit sex is erotic and fantastical. It might not be the most common of fetishes, but it's an entirely healthy and explicable one! Some of those people will prefer their partner's armpits to be unshaved and/or unwashed, while others are more a fan of smooth and sweet; whatever you're into, talk it over with your partner to find out if they'd be happy to help you indulge this particular fantasy.
Kinksters wanting to add something more to their bondage play have been hooked by a devious and simple device: the anal hook. Simply made out of stainless steel, this hook has a ball at one end to insert into the anus of any willing sub and an O ring at the other end to tie rope to. This can then be tied to another part of the sub’s body or to a hard point. Any movement then makes the hook slide deeper, causing discomfort. Perfect if you need to keep a submissive still, always use lube and only use an anal hook if you have experience with rope.