"Oh, Heaven-- Hell-- fuck," Crowley says, articulately, losing his balance on his supporting arm and falling flat onto his back on the bed. Is this why humans do sex all the time?

Crowley's breathing rapidly grows ragged, and a hand desperate for something to hold into finds a grip in Rhea'li's hair. The twin heads of his hemipenes are starting to press the opening concealing them open, leaving them even more available to Rhea'li's tongue.