It's just far enough away from feeling like a cock that he doesn't feel like his boundaries have been crossed, but it's thick enough that it really makes a difference.

"Double," he gasps, eyes flying open. He could come easily, untouched, from being worked over- but, right before he comes, he strokes himself just a few times so he can direct the spray of come. Thick ribbons of it land on Trouble's forehead and cheeks, and the sight gets him to clench even harder around Trouble's tongue.