I'm curious, do you buy this?
Some evidence to consider...
- During the Depression, lipstick sales increased by 25 percent.
- After 9/11, US lipstick sales increased by 11 percent.
- But, are the above events merely anecdotal? There seems to be no direct correlation in the graph (from The Economist) below. Notice that lipstick sales are also rising with GDP growth.

- And, just for fun I'll throw in some Google, Facebook, and Twitter trends that I did - inspired by google.org's Flu Trends. Be careful, those spikes you see in 2008 might have to do with Obama's "lipstick on a pig" comment in Virginia during election season. Not surprisingly, Twitterers are rather quiet on the topic.
Google Trends

Facebook Lexicon

Twist (a Twitter trends site)

And for the record, I bought the lipgloss.