Is this normal?

When I was young, anybody whose teeth were this white would really have stood out in a crowd, especially if he had wrinkles and was obviously not born yesterday. Today nobody even looks twice. I did whiten my teeth once, but it made them so sensitive I didn't like the way they felt, so I didn't keep it up. I use some whitening toothpaste but I don't see much difference in my teeth with it.

Now every time I turn around there's another whitening advertisement in the sidebar of several of the websites I visit. There's one about some mom who learned some simple trick, but I don't go to those sites just in case they carry viruses or some trojan software.

Fashions vary, but I'm happy to find that I can just whiten my teeth after the fact, while I'm busy airbrushing out wrinkles and fixing up my crepey neck. People who know me might notice that my teeth are not glistening white, but frankly, I think they look more normal than the guy's teeth in the picture. What do you think about it? Do you whiten your own pearlies, and if so, why? Fashion? To look younger? I'm curious.
:-)