The snake had come out from a crack in the wall. He dragged his yellow brown soft-belly over the edge of the stone tough and rested his throat upon it. Then he started sipping water from the place where it had collected in a small clearness. He used his straight mouth and straight gums to sip water silently into his slack long body.
(a) He sipped with his straight mouth.
(b) Softly drank through his straight.