Lost things

Have you ever noticed that some things that get lost are fairly universal?  It seems that everyone I talk to has at least one missing sock.  Some lost things are specific to the person, my daughter and her shoes,  my mom and her phone, my husband and his favorite hat.  Yet other lost things are household or family specific.  In our house the major lost thing is hairbrushes.  I have several theories about this.  I used to think that my daughter hid them because she doesn't like to brush her hair.  It seems she hasn't thought it through enough to be that deliberate.  My leading theory right now is invisible creatures about 2 feet tall that eat yogurt.   How did I arrive at this theory you ask.  Well, for some reason there are strawberry yogurt finger prints about 2 feet from the ground on several walls and the fridge.  My children all deny being the culprit of course so it must be invisible creatures.  If there are invisible creatures making fingerprints on the walls they would also likely hide the hairbrush.  See problem solved.  Now if I can somehow catch them in the act and get the brushes back...