Poison gasps sharply when he feels Jack tighten like that. He bites Jack again, then sucks hard, like he plans to leave a hickey right there over the nipple. Maybe Jack will feel it later... Fuck the thought makes his cock twitch. He has to move higher - being bent as he is makes thrusting too difficult, he can't get the force he wants. He leaves little red bite marks across Jack's breast, up to his neck. He finds a promising spot and bites again, holding on this time.