normal?

So DD is actually getting teeth. I can see and feel them yay. Lol she is 10.5 months old.

Well the past few days, since they have been starting to come in, she.is taking.hard.toys and hitting herself just under her lip (two bottom teeth) really hard.

Is this weird or normal? Lol. Also she has started to head butt things too. Like the cat, but the cat fuses on her so she does it back. But all her doll toys she plays with she holds them close to her face squealing with excitement then head butts them laughs and gives them kisses. I have no idea why.

I know some do it in frustration and anger, but what about in playtime, is that weird? Lol