Otters Holding Hands

At the risk of people questioning my manhood, I must admit that this YouTube video is interesting. I don't know much about Otters, so I have no idea if this kind of thing is common, or whether it is common in other species either. At first I thought it was coincidence, but it seems pretty intentional... I mean, after they separate for a bit when they swim back around to each other the one reaches out to reconnect. Pretty cool...