The way Dave moves and pants is impossible not to respond to. Gamzee groans with the effort of holding still and then abandons that course entirely. He still tries to hold back, keep it slow and torturous, but he can't stop the sharp, hard thrusts of his hips as his bulge writhes and moves with the same urgency as before. He presses his back into the faint sting of Dave's nails and starts leaving shallow bites all the way down Dave's neck. He's chirping constantly, unable to hold back the alien sounds as the pleasure lashes at him, trying to drive him into a frenzy.

"Any motherfucker can be up and all leaving scars." Fuck. "Dave. Dave-- Dave!"

With each snarling gasp of Dave's name over the other sounds he's making he drives his hips forward, knowing he's losing the battle to keep this slow and drag it out, but having more and more trouble caring.