"Which girl do you want to have it?" she asked seriously as she lifted off him.

For a moment his organ was open to the sky. Prior sat up hurriedly, packed in his apparatus together with an inadvertent handful of sand, and zipped up his fly. "Have what?"

"Your donation. I have to do it within half an hour, usually, or too many sperm cells die and it can't take. I don't have refrigeration capacity the way my northern cousins do. Of course their whole bodies are icy cold, which makes collection difficult except in the case of the most determined dreaming sinners, the kind who would shoot off into icebergs if they had the right sized holes in them. And her period has to be right, too. The supervisor's very finicky about such details."

"You mean you're serious about this succubus-incubus bit? It's not just a come-on?"

"Of course it's a come-on. You came; I got on," she said, making a moue. Her lips were very expressive; she probably knew how to use them in her profession, too. "Hurry up. Make a choice. Someone sleeping, of course."

He tried to call her bluff. "Don't you have to—to convert? To incubus?"

"Just watch me carefully. I can't be too obvious, obviously. People would stare, and we aren't supposed to attract attention to ourselves. Not in a business connection, anyway. A demon can get herself burned, that way. Are you going to choose?"

Prior looked about. Time had passed, and either some of the girlchildren had blossomed into nubility or the beach fauna had benefited from some turnover. But in his present sated state he found this interesting primarily in an intellectual way. He had no particular urge to impregnate any of the pregnable. In fact, the notion was a trifle disgusting.