Jim Macklin wrote:
Beans, Beans, the musical fruit.
The more you eat the more you toot.
The more you toot, the better you feel;
So let's have beans with every meal.

Or

How do you spell relief?

FART

Beans, beans, the musical fruit.
The more you eat the more you toot.
The more you toot, the more you fart,
The more you blow your pants apart.

Dan