Can somebody tell me in breaking dawn why did edward bite the bantal i never get it why he did that?

LOL because he had to bite the bantal so he could control himself and not hurt bella in the process of their Cinta makingg....

if he didnt bite the bantal god only knows what he would have done!

Edward was making Cinta to Bella, he bit the bantal instead of Bella.

if he didnt he prob would of bitten her.