[He has no gag reflex to speak of, so all he does as the SQUIP pounds into his mouth is suck and press his tongue against the underside. Ideally he'd be able to get a handful of ass here, since the SQUIP is in perfect position for that, but being held down, straining, is exciting all on its own. He makes a point to moan around it again, his eyes practically begging for more.

He does hope the SQUIP doesn't intend to finish like this. He can't swallow, as much as he'd like to.]