" I don't understand humans." Caradoc shook his head. " It takes their brightest minds decades to plan an unmanned voyage to the nearest planet, which can take a year to travel each way. Yet they expect there to be aliens travelling distances it takes light decades to reach us, just for a weekend of bum fun with a total stranger without asking their permission, before dropping them off where they found them. They're just dying to believe the weirdest, least plausible things possible. "