Wet pants?

It rained a lot last night and everything is wet, including the seat cushion for the tractor. Well our three-year-old grabbed the car keys and headed for the tractor. (He knows it takes a key to start the tractor, who cares if it is a car key or not, it's still a key.) Anyway, he climbs up on the tractor and places his hand on the wet soggy tractor seat cushion. After realizing he probably didn't want to sit on that side of it, he flips it over and discovers that side it wet also. Have you ever heard about the fact that putting your hands in water can make you go to the bathroom? After determining the seat cushion was wet and getting his hands all wet he then proceeded to pull down his pants and go potty off the side of the tractor. We have worked with him on when and where to eliminate, but at three, if you have to go, you have to go. He then abandoned the tractor for some other three-year-old activity. At least he didn't come in with wet pants either from the tractor seat cushion or going potty in his pants.