Is it normal that my boyfriend chases and bites me?

So not actually a sexual thing per se, the biting is also not hard enough to leave marks and usually involves being chased around until I can be caught and bit. the biting may be on arms, legs, the but, the top of my head, anywhere really... sort of a gentle chewing more than a single bite. The same sorta thing that might happen when your boyfriend tickles you. Except biting. I don't actually mind, just wondering how normal this is.