The OEDILF is a website trying to index a limerick for every word in the English language, some of them are pretty cool, here's one for the word "Affection":

"The objects of young men's affections
Have looks often far from perfection,
But love hides all flaws,
Each one's perfect because
It's a matter of heart (and erections)."

:-)

And speaking of "hiding all flawes" in the limerick, this commercial stupified me, absolutely stupified me. I watched it 5 times. One the on hand I'm wondering if marketing like this actually works, and on the other I can barely stop myself from sheading a tear... especially the grandmother one... woah, that commercial really hits hard.