The rapture that takes over the line of Eggsy's shoulder is a nice added touch, the need in his voice. Quentin scrapes his teeth on Eggsy's skin, not quite seeking bruises but giving him little reminders that this at least feels real.

There is a part of him that wants to fuck Eggsy, but it's certainly not loud enough to get its way. Instead, Quentin's content to work him right until he can feel Eggsy twisting in his hand--and then move his hand off him entirely, gripping his hips to keep him from trying to rub against the wall for relief.