Run 'Round Naked?

Grayson is officially potty training. We've been working on this for a couple of weeks and have really made some progress. He does really well at home, when I let him just run around naked all day, but as soon as you put a pull-up on him, he will surly pee in it. So, now every morning when I take his diaper off of him, he looks at me and says "Run 'round naked, everywhere?" He loves it, but getting him dressed to get somewhere is more difficult! I guess he won't be wearing a diaper to college, he'll just be going naked! :)