Barry whines in the back of his throat, not sure how he's meant to hold off when Derek is stroking him so beautifully. Every slide of his huge, warm hand is heaven, and Barry closes his eyes, intensifying the thrum at his core to spur Derek on. Time stretches and threatens to slow, dangling him right on that delicious precipice, but Barry doesn't let it, holding off until he feels Derek spill inside of him.

"Only if you bite me," he ekes out, letting his head fall to the side. "Put your teeth in me and come, Derek."