That thing that touches your leg when you swim.
I want to wrap it in a towel and pet its little head. Poor wittle sloth! Why aren't there ever any sloths when I go swimming? Here is the story behind the picture, but be warned, it'll ruin the mood.
Also, Stephen so would jump into the water to safe his sloth if it fell overboard, despite knowing it can swim (there could be sharks, or maybe the water isn't calm), and then almost drowning himself.