I have an injured toe, too swollen for a shoe, and of course keep bumping it into furniture. This morning I hit it so hard that it hurt clear to my knee and I had to yelp and moan as I collapsed on to the couch. Four of my girls were instantly there comforting me. One was patting me, one rubbing my face, and two went right to the sore toe to sniff it. Now how did they know that is why I hollered and where it hurt?