Sex, whatever else it is, is an athletic skill. The more you practice, the more you can, the more you want to, the more you enjoy it, the less it tires you. – Robert A. Heinlein, The Cat Who Walks Through Walls
Admittedly, he'd had too much to drink the night before. She was brown and furry and that had been enough at 3 a.m. But what now? Couldn't chew off both legs.