Jack's eye flutters closed and his mouth moves erratically against Steven's, the impediment of air effecting his control and focus.

Shit he wishes this wasn't their first practice session, because he's already desperate for this to go a lot further. There's nothing like the way everything just sort of melts away the less he can breathe, how the painful pressure around his neck doesn't feel like pain at all, it feels friggin amazing...

But it's too risky. Much as he wants to press down harder, hold Steven's hands snug around his throat until he's close to passing out...he instead taps swiftly but gently against the back's of Steven's hands, what he assumes is a clear signal to loosen his grip.