Women in Sports Apparel

When I see a woman wearing nothing but a Michigan Jersey or a Team USA jersey I get excited but why? I don't want to bang Mike Hart or Landon Donovan, but the idea that the girl may very well share some type of common interest to you is appealing. If you see a woman in your team sports team apparel is it sexier to you? Does she look that much more appealing to you? Is this weird? For me its real cool to see at first but that shit would have to come off asap if things were about to go down.