When you've got a tan the best thing you can possibly do, to annoy those who remain white as a sheet at least, is wear a white shirt. Showing off your healthy, glowing skin (you've sun creamed and after-sunned correctly, etc) is augmented with a nice crisp white shirt.
And, perhaps that's why one shirt seller has reported a massive 50% increase in the sales of white shirts in 2009. Others though, suggest it's a way to appear professional (or go unnoticed) during these tough economic conditions. But other shops have reported no sharp increase. So why has this happened? Any ideas fair readers?