Yes, your colon IS up your butt.

In Washington, billboards like this one were ALMOST posted by a government agency.

The idea is this: Your colon is the last part of your large intestine. It runs right up to your rectum. So your colon IS up your butt.

And since people over 50 are at risk for colon cancer, this billboard is encouraging health check-ups. So what's the problem? It turns out that some people in Washington think the ad is in "poor taste"! Sheesh.

Story here.