Imagine the scene: it is 1970 and Sally's in the International Hotel, Las Vegas, and Elvis is on stage. He's wearing a sexy white catsuit and prowling the stage (the clothing isn't important to the joke to be fair). Sally had just had a chicken dinner (that bit's important), it was delicious. Elvis sings 'Patch It Up' and then goes offstage.
A little later, who arrives at Sally's table but The King himself:
Elvis: So, baby, whaddidyou thinka mah show?
Sally: It was good, but why were you singing about cacciatore?
I'll just wait for the laughter to die down... Are you done? Ooh no, there's another little pocket starting up... You done? Yep.
Right, obviously it was hilarious, and you don't need me to explain the joke, but obviously because I'm such an artist I find it a valuable part of my process to explore the genius of it all. Obviously the crux of the humour lies in the phonetic similarity of 'patch it up' and 'cacciatore'. It seems simple, but obviously I've made it very effective. Additional layers have been added with the tongue-in-cheek Elvis dialogue and, as you'd expect with one of my witty smorgasbords, the brilliant image presented.
Anyway, the exertion I have gone through to produce this has left me quite tired, so I'm going to leave it there. Try not to praise me too much in the comments, remember that being this funny is just natural for me and, in a sense, it's unfair to congratulate me for it.