I got this from the Harry Potter spot:

Basically, you have to think of a random line that rhymes with the one above it, and then you start off again with a fresh line. Here's an example:

Sweet cabbage is what my feet smell like. ☺

Then you answer:

I love to eat pickles while taking a hike!

(Then start off a new line for someone else to rhyme with)

Okay?

Here's the first line:

Pizza is good anytime, even in the bath!