Professor Jerry Coyne presenterar en lösning på ett av tillvarons mysterier:
Natural selection maintains the repugnant taste of sperm so that a man’s sperm will wind up in the appropriate place: the vagina and not the stomach. So long as sperm tastes bad, women will not be tempted to swallow it, but will turn their male partner towards conventional intercourse, which of course is the only act that will produce children. In other words, any male with good-tasting sperm would have fewer offspring than his competitors. A man whose sperm tasted like honey would probably not have any children at all.
Evolutionen är elak mot dem som inte är intresserade av barnalstring — men marknadsekonomin kommer till deras räddning.