[Darc has some convenient handles with nice grip to hang onto. He thrills, wide-eyed, at how good it feels to have Shiro trembling around him. He wonders for a moment if he did something wrong or hurt him badly by the sudden way he thrashes, but he recognizes it enough, it's familiar enough.

He moans, breathless, starting to fuck him. the girth of his dick pulses and rubs deep inside of his tightly stretched hole, and his deep voice rumbles in Shiro's ear.]

How many is the absolute best, for a human? I swear I'll surpass it for you.