his finger is pushing in and pulling out , mirroring the action of our joining , and i 'm coming apart , thrashing on top of him , screaming wordlessly , crashing down onto him hard again and again , and he 's moving and thrusting up into me , and i feel him explode inside me , feel the hot gush of his release , and the universe that was within me is expanding out of my pores , fire in my veins and heat in my blood and i can only scream through gnashing teeth , biting his skin until he grunts .