+1 for the blonde

A blonde city girl named Amy marries a Colorado rancher. One morning, on his way to check on the cows, the rancher says to Amy," The insemination man is coming over to impregnate on of our cows today, so I drove a nail into the 2X4 above where the cow's stall is in the barn. Please show him where the cow is when he gets here, OK?" The rancher leaves for the fields. After a while, the artificial insemination man arrives and knocks on the front door. Amy takes him down to the barn. They walk along the row of cows and when Amy sees the nail, she tells him, " this is the one right here." The man, assuming he is dealing with an air head blonde, asks," Tell me lady, because I'm dying to know how you that this cow is the right one to be bred?" "That's simple," she replied. " By the nail that's over its stall," she explains very confidently. Laughing rudely at her, the man says, " And what is the nail for?" The blond turns to walk away and says sweetly over her shoulder, " I guess it's to hang your pants on."