Just To See You Smile

I will get down on all fours for that smile of yours,
It should be illegal as those whites are a weapon,
You flash that glee and I'm knocked to my knees.
This is my original sin as I know I will never win.
I'd be a fool just for you,
I'll do anything to make you smile,
Because those pearly whites keep me going for miles.
You brighten my day in no other way.
I'm like a fish that fell hook, line, and sinker,
But in my mind, it was a "no-thinker".
As time is a thief and our looks will diminish,
I know I'll be your side all the way to the finish.