Poison moves a bit, hips sliding towards Jack but he's careful not to push too much or compromise Jack's rhythm. One hand strokes down to gently grip the back of Jack's neck; the other strokes his cheek, feeling it hollow out a little whenever Jack's mouth slides back.

"Just like that." A moan edges his voice. "Not gonna take me long... Don't judge. Been waiting for this since the dance floor." He grins, but the expression falters and he can't help the slight upward push of his hips the next time Jack sinks down.

Okay, maybe the other reason he got on his back is because it's easier for Jack to avoid choking. Maybe.