Here we go !

Riddle #3


Arnold Schwartzenegger has a big one,
Michael J. Fox has a small one,
Madonna doesn't have one,
The Pope has one but doesn't use it,
Clinton uses his all the time,
Mickey Mouse has an unusual one,
George Burns' was hot,
Liberace didn't use his with women,
Jerry Seinfeld is very proud of his,
We never saw Lucy use Desi's

What is it?