"Healthiest animals in the world but they can't ever leave the laboratory.  Child, I'm not running a sterile laboratory.  Mike has got to get acquainted with 'filth,' as you call it - and get immunized to it.  One day he's going to meet the gal who wrote this letter, or her spiritual twin sister - in fact he's going to meet her by the dozens and hundreds, shucks, with his notoriety and his looks he can spend his life skipping from one warm bed to another, if he likes.  You can't stop it, I can't stop it; it's up to Mike.  Furthermore, I wouldn't want to stop it, although for my taste it's a silly way to spend one's life - doing the same monotonous exercises over and over again, I mean - what do you think?"