Just admit it already!
Depending in what part of the world you are living, in the not too distant past, (or maybe even today) people shagged animals. A lot.
But no one wants to admit that their ancestors bumped nasties with the livestock.
Why did Great-great Grandma stop have kids at number 7 or 8 or 9? Did Great-great GrandPa finally figure out how to put that new fangled rubber thing on? Or did the morning milking's start taking longer? (I firmly believe that there been much more human semen squirted into cow cunts then bovine.)
And speaking of the "Family Cow". How many different meanings can you come up with?
With those 9 or so kids, we can assume several would be boys. With their own ragging hormones...