It's not just a judgment call that bikinis make men stupid -- it's a scientific fact. Check out this month's issue of the Journal of Consumer Research for the skinny on this truth. Here's the gist of it.

Belgian researchers conducted tests on 358 young men and found that they made poor decisions after looking at images of women in bikinis, touching bras, and watching video clips of young women, dressed in bikinis, run across hills, fields, and beaches. Basically, men become more impulsive after exposure to sexual cues. Ever wonder why automakers place leggy models in front of high-priced cars at auto shows? This is why.

Other studies offer their support. In 2006, for example, it was determined that sexually-aroused men would do all sorts of things they might not otherwise do. Essentially, sex narrows a man's mind. When they think about sex, pretty much all they can do is think about sex. Whether or not women are blinded by sex remains to be seen -- most studies have been done on men only.

Don't let bikinis get the best of you this summer, guys, or you might end up looking like quite a boob.