Irish limerick

I just got this in an email from a friend of mine and had to post it:

Just thought of this..it's cheesy, but limericks are associated with Ireland, which is associated with luck, so hopefully this will bring you good luck on your test:

There once was a girl named Cat
Who totally aced the DAT.
Her efforts relentless,
She'll make a great dentist,
There is no doubt about that!