That gets a moan because they're apparently both people that want someone telling them what to do. Future Pratt might realize that they're probably bad for each other, but current Pratt doesn't give a shit because this is one hell of dick and he's gonna enjoy himself.

He's real good at taking direction, so if that's what Max likes, that's what he gets. Pratt's eyes glance up at him as he drags his lower teeth along the bottom of his head. After all he said he wouldn't bite his dick off, he never said he wouldn't use his teeth.