Just because I freaking love it.
I used to have a "pet" opossum. It lived in the tree just outside our apartment when I was a kid. It would come down and hang upside down on the branch and just stare at me while I talked to it. I named her Penelope.
Then one day she came down with three babies and they would all just hang there upside down, listening to me while I talked to them. I wanted to bring them in the house and feed them but that's where my mom drew the line. :)