Pratt isn't going to think about why Max is so good at this. In fact he's not gonna think about anything for the next little while as his brain has oozed out of his skull and down his spine to pool in his pelvis somewhere.

"Fuuuuuck." Very eloquent as he pulls one hand away from Max's hair and uses it to brace behind himself so he doesn't fall over onto the bed. Not that he'd mind at this point because it certainly feels like Max is straight up sucking his soul out through his dick. The slower pace is appreciated so Pratt doesn't embarrassingly blow his load in the next thirty seconds, but he whines a little because everything feels too good. There's a hint that Pratt is probably pretty noisy during sex.