I have heard it said before that President Bush is very mindful of germs, and is a fan of constant Purell usage - but I do suspect this was an attempt to get Clinton's attention.
Though I do find the thought of Bush using Clinton's shirt as a towel hilarious.
That was pretty much the way I saw it too.
Another thought too....by now with these two traveling around together, and both with a sense of humor...
I could see me in the same situation with M and wiping my hand on his shirt, then laughing about it. Just as if I had on a pair of jeans...in the same situation...and he swiped his hand on my tush....and then try to pass it off and he wanted to give me a "love pat"....
We've both done the above to each other when out fishing and having put our hands in the water or on a fish.
People need to lighten up and stop reading so much into what is probably an innocent act....