It didn't stop him from worrying over the fact that he might.

But he did slowly thrust up into him, letting out a groan as he felt the vibrations of Stiles around him. "God, if you need me to stop, just, say it, okay?" He panted, focusing on Stiles head as he spoke to him, but doing his best not to focus on the fact that Stiles really did have his mouth around his dick.