There was a virgin who wanted to marry a farmer boy.  One day, she went
to his parents' house for dinner. When they got done eating dinner, they 
decided to go for a walk through the pasture. While they were walking 
they came upon the 2 horses that were mating.  She looks at them with 
wonder because she's never seen anything like this before so she asks 
the boy,"What are they doing?"
He says "They're making love."
"Well, what's that long thing he's sticking in there?" She ask.
"Oh, uh, that's his rope" he answered.
"Well, what are those two round things on the other end?" she ask.
He says "Those are his knots"
She says, "Oh, Ok I got it." As they continue their stroll, they come
to a barn and go in.  She looks at him and says, "I want you to make love 
to me the way those animals were."Surprised and excited, the boy agrees. 
While they're getting all hot and heavy, she grabs his testicles and squeezes.
"Whoa, what are you doing?" he shouts.
The girl innocently replies, "I'm untying the knots so I'll get more rope."