'Well, basically there are two sorts of opera,' said Nanny, who also had the true witch's ability to be confidently expert on the basis of no experience whatsoever. 'There's your heavy opera, where basically people sing foreign and it goes like "Oh oh oh, I am dyin', oh, I am dyin', oh, oh, oh, that's what I'm doin'", and there's your light opera, where they sing in foreign and it basically goes "Beer! Beer! Beer! Beer! I like to drink lots of beer!", although sometimes they drink champagne instead. That's basically all of opera, reely.'

The singers all loathe the sight of one another, the chorus despises the singers, they both hate the orchestra, and everyone fears the conductor; the staff on one prompt side won't talk to the staff on the opposite prompt side, the dancers are all crazed from hunger in any case...

Greebo could, in fact, commit sexual harassment simply by sitting very quietly in the next room.