"I'm not sure if that counts as a nice thing or not." He props his cheek on Wash's thigh, tonguing at the skin there while he watches that reaction just, roll up the length of his spine. Okay. So that's a good thing. Like he does with any other trick or catch in a lock- York exploits this.

Shamelessly.

He peels his lip back from his teeth enough that Wash could, if he wanted, watch him repeat the gesture- dragging from the skin just under his navel to the base of his cock in a long line all the way up to the head, stopping just shy to swap out for the tip of his tongue rolling around the far more sensitive skin instead.