Is it true that some people never fart?
No, not if they're alive. People even fart shortly after death.

Do even movie stars fart?
(Question submitted by Mermaid2006)

Yes, of course. So do grandmothers, priests, kings, presidents, opera singers, beauty queens, and nuns. Even Yoda farts. See the Britney Smears music video "Oops, I farted again."
Do men fart more than women?
(Submitted by Bigdude)

No, women fart just as much as men. It's just that most men take more pride in it than most women. There is a large variation among individuals in the amount of fart gas produced per day, but the variation does not correlate with gender.
I have read that men fart more often than women. If this is true, then women must be saving it up and expelling more gas per fart than men do.
Do men's farts smell worse than women's farts?
Based on what I have experienced of women's farts, all I can say is that I hope not. Scientific studies of farts show that women's farts have a higher concentration of odor-causing gases than men's farts, but men's farts have a larger volume. The two factors equalize out (the same number of stench molecules for both), so the odor is about the same.
http://www.heptune.com/farts.html