The pressure on his neck isn't hurtful and it doesn't seem like it intends to do any harm whatsoever. Sizhui does feel what he thinks he's supposed to; the faint press, slight dizziness of blood loss for just a few moments, which makes his head swim delightfully and has stars winking into his vision. Is that what it's for?

He doesn't give pause either, keeps right on bucking his hips in quick, measured thrusts, making sure to drag the heat of himself over Jiang Cheng's lap again and again. Maybe Jiang Cheng is only worried about his pleasure, but Sizhui's focused on them both, intent on getting his partner off just as much as he's planning to come, too. Another fluid motion forward into the hand on his cock then back and forth and back, surefire and steady— until Jiang Cheng squeezes, tells him he can't come without his permission.

It wrings a breathless yelp out of him, makes him halt his motions as absolute astonishment overtakes his features at him actually laying claim to his cock. He nods, both to show he understands and that he meant what he said. “I am.” Then his arms lift somewhat, hands stretching, fingers groping for nothing in particular while he squirms harder. “Oh, it— it feels so good... Faster, Daddy, please!”