I grew up on agricultural research farm. My sister and I spent a lot of time on the farm and used to play various games in the milking parlour. My Dad taught us all kinds of things, like how to know there was cow dung in the grass (so my mother wouldn't kill him or us) by watching for taller, greener grass. We had great fun and learned all kinds of useful things, including 'cows playing'.
When the cows played one jumped up on the other. My sister and I used to be quite worried about this because we were afraid that the cow underneath would get hurt. My Dad always assured us that it was ok, the cows were just playing. As we got a little older, and more reliable, my Dad would get us to sit at the edge of the field and watch the cows. If they started playing our job was to call him. He would rush out and take down the numbers from their ear tags and then go back into the office. We were quite happy to do this 'job' and we were very careful not to sit on any grass that was greener and higher than the rest of the grass!
By now you have probably figured out what the cows were doing, but I never did! I was 11 when we moved from the farm and hadn't worked it out. In fact (gulp) I didn't figure it out until I was 19 when I saw two dogs 'playing' and then understanding crashed into my head. By this time I wasn't living with my parents so I rushed home to phone my Dad and begged him to tell me if it was true. The cows hadn't been 'playing' for all those years?
My Dad couldn't stop laughing long enough to answer my question!
By the way, I did say nineteen, that wasn't a typing error. I got married when I was 27 and that was the first, and only time, I have ever told that story, until now. I have butterflies in my tummy!
Consider yourself dared, go on, you know you want to!