Boy Germs. Literally.

I was cleaning off my disc in my camera when I came across this picture. On our road trip to Michigan, only 10 minutes into the drive, I noticed a foot hanging over my seat. Without knowledge to the foot's owner, I took a picture to have proof that they truly are dirty little creatures. Before we got on the road, both the boys took showers...long showers. I'm seriously considering tying them down and scrubbing their feet with a steel wool brush. I honestly haven't seen their feet clean all summer. Are your kids like this?? How do they get so dirty?? Maybe NEVER wearing shoes this summer may have something to do with that??!!