Mad cow disease jokes

So there were these two cows, chatting over the fence
between their fields.
The first cow said,"I tell you, this mad-cow-disease is really
pretty scary. They say it is spreading fast; I heard it hit
some cows down on the Johnson Farm."
The other cow replies, "Hell, I ain't worried, it don't affect us
ducks."
A female reporter was conducting an interview with a farmer
about Mad Cow Disease. "Mr. Brown, do you have any idea
what might be the cause of the disease?"
"Sure. Do you know the bulls only screw the cows once a
year?"
"Umm, sir, that is a new piece of information, but what's the
relationship between this and Mad Cow?"
"And did you know we milk the cows twice a day?"
"Mr. Brown, that's interesting, but, what's the point?"
"Lady, the point is this: if I'm playing with your tits twice a
day, but only screwing you once a year, wouldn't you go
mad, too?"