Bart Simpson: "Look, Santa's Little Helper is trying to play leapfrog with (girlfriend dog) and can't make it! Come on boy, you can do it!"
A few years back I visited an aquarium. Might have been the wonderful Monterey Bay aquarium. In any case, a docent explained that the three sea otters normally on display had to be separated because one of the ladies was in season.
"You might observe behaviors associated with this time" she added cryptically.
One lady otter was floating on her back high above the audiences' heads, vigorously, um, whacking away.
I'm glad I didn't have a kid I had to explain that to.