"Do geese see God?"  is a palindrome. That is, it reads the same backward as forward. What's your favourite palindrome?

Wow! All I could come up with was boob!

Go hang a salami!

I'm a lasagna hog!

EDIT: On second thought, that doesn't say the same thing. How about... 

Sit on a potato pan otis.

Here's one that I found:

Doc, Note: I Dissent. A Fast Never Prevents A Fatness. I Diet On Cod.It has 52 letters and is made of 13 words

Hi Didge,

This has been my favourite palindrome ever since I found it about two years ago now:

DENNIS AND EDNA SINNED

Since coming upon that one, however, I have suffered from aibohphobia, and thus had to stop looking at palindromes. 

Concerning de Lesseps

A man, a plan, a canal, Panama