One of the funniest stories I've ever heard came from comedian Tim Conway(Carol Burnett Show, McHale's Navy). He was explaining how he learned about the facts of life:

My dad and I used to go out for walks all the time. Sometimes we'd go to a relative's farm. Well, one day dad & I were walking through a pasture, when we came upon a bull mounted on a cow.

"What's that all about?" I asked my dad.

"Uh-hmm, well, you see Tim, it's windy and the strong wind blew that bull up on the cow's back." My dad though he'd avoided an embarrassing moment.

But I came back with, "Then, what are they doing with all that grunting and groaning?"

My dad stairs into the air and mumbled, "Uhhhh, yeah, well, they're making cookies."

So, my whole young life I went with that explanation until one day, this cute girl at school asked me to come over to HER house after school.

"What'll we do? I asked almost in avoidance.

"Well," she shot back. "We can make cookies.'

I stared back at her in disbelief and said, "Oh, I don't think so. It's not NEAR windy enough!!"