CHARLIE BIT ME FINGER!!

Ha ha I wish it was my finger and my babies name is NOT Charlie lol. So my 16 week old baby has been biting the HECK out of my nipple 😩 I know he's teething but I want him to stop! He bites and then pulls back and I literally holler!! He laughs and does it again! He thinks it's funny, I am in need of serious help lord know hell rip it clean off when is teeth finally do come in. I've tried smothering him with the boob to get him off but he only bites harder while turning his head at the same time!! Please help....