Oh; regarding shipwide Sanitation. Due to simple expedience and occasional studies (aka; some guy said such-and-such) every crew member has an injection that renders them temporarily sterile, though not sexually inactive, as the average long tour was found to be a year in space.<br/><br/>Also, the same injection has an engineered chemical that binds to the XX chromosome marker and naturally removes all body hair below the neckline, so there's no risk of floating hair getting into things that they shouldn't if the ship is forced to operate when the gravity generator systems are offline.