'And the reason some people think it's dirty, son, is that even prudes can have their minds in the gutter.'
No, dear FR poster, most people have a general idea of anatomy, even horses, and when the mental image of the President 'milking' a horse, a male horse, we all quickly pictured.....uh, the ear?....uh, the hoof?...no wait...I know: THE TAIL! uh no, that's too far out there, oh my goodness, she must mean, the sex organ.
(Oh, no, I admitted it, am I perverted? how can I repent?)
I didn't think that. But I'm a little naive.
You can either simply laugh that the person in the joke doesn't know a male horse from a cow, or you can think longer and harder about it, applying your own personal experiences and fantasies to it, until you reach the conclusion you desire.
That's part of the beauty of the joke. That's why its been around for a thousand years.
Most of us who have male horses have geldings... it's rare folk who have stallions around... And even so... male horses are not stimulated by handling them, as horse owners who have to clean them from time to time know.... so the idea of getting anything out of the average male horse is, well, preposterous! That's why it was a joke.
...she must mean, the sex organ.
The reason the joke was funny was not because a stallion has a "sex organ." It was funny because a stallion has no udder--not even that of a mare, and certainly not that of a cow.
But thank you for perfectly illustrating my point regarding prudes, minds, and gutters.