Nanny explains opera to Granny.
Nanny: Well, basically there are two sorts of operas. 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.
Granny: What? Is that it? Either dyin' or drinkin' beer?
Nanny: We-ell, there might be some other stuff, but generally it's stout or stabbin'.