I'm terrible and never check pockets. Needless to say this has sometimes been a disaster - lipstick and crayons come to mind. But my son, especially, was bad about leaving money in his pocket and when I found it in the washing machine or dryer I always thanked him for paying me for doing the washing. I did return a $20 bill I found in there once. But I keep a glass piggy bank by the washer and usually have a little stash in it, all "laundry money". My son is now grown but my husband occasionally "pays" me for doing the laundry too. I actually get a grin when I find some, as it reminds me of how it all started with my son always leaving money in his pockets.
Jan