"Why not? You'd drink it. If I pissed in your mouth, you'd drink it for me. And you'd probably jizz all over yourself again knowing how much it pleased me."

Yes, Mink is being nice. Or at least, on the scale of Mink's ability to be anything but cruel, he's not hurting Aoba. Yet. It's more fun to let the words sink in, to have Aoba do this on his own. That way, the next time he forces himself in, Aoba won't be able to deny that twice is no coincidence.

"I'd shit in your mouth too. If I didn't think you'd like it so much." Mink's fingers let go of Aoba's hair, finding a place instead at the hinge of his jaw. His thumb rolls over Aoba's lips like a promise. "Open up."