K.K.
My 7 month old has no teeth yet and the gummy bites hurt enough - so I have no advice about the biting. I say "no bites" and he just smiles and we both laugh. HOWEVER... about the distractions - this is a BIG problem with my curious little fellow. Firstly, we can now rarely nurse if there is anyone else in the room (especially any of his 3 siblings that he just loves to play with) - I also find that the only sessions that he is really into is when he is REALLY hungry (first thing in the morning) or REALLY tired (before afternoon nap and before bed). Any other time I need to keep him focused and I have uses a variety of things. Firstly I sing to him songs that make him look at my face (while staying latched) like all the various animals on the bus (the snakes on the bus go hiss, hiss, hiss, all through the town)that makes funny noises. I also have worn this string of beads that he plays with while nursing. Once I even held the ring part of a pacifier in my mouth and he flipped the rubber part around while nursing. He is focused on the "entertainment" and doesn't realize that he is eating at the same time! These measures may sound crazy but my son was constantly yanking away from his latch and trying to sit up to check out the scenery.
Good Luck!