money laundering

Several weeks ago when I was taking Mike's underwear out of the dryer, I found a $20 bill.  That was very odd. First, that I didn't see it either putting the clothes into the washer or when I transfered them to the dryer. Second, does Mike have a pocket in his underwear where he kept his money?

Of course I did what any good wife would do and I pocketed the money. I'm sure it was a tip for doing the laundry. I put the money in my shorts which are pajamas or just lay around the house clothes. A couple of weeks later I washed my shorts. I always check my pockets, but why would anyone check their pajama pockets? As my clothes were washing, I remembered the $20. I rescued it from my pocket before it went to the dryer again. That has to be the cleanest $20 bill around.