"The behavior had no obvious connection to mating or survival, nor was it rewarded by the scientists. It was, apparently, just for fun." They lost me there. P

"The behavior had no obvious connection to mating or survival, nor was it rewarded by the scientists. It was, apparently, just for fun." They lost me there. People do lots of things that aren't for survival, don't have to do with mating, and aren't fun.