Tetanus shot

[2BHNTN]

This old man in his eighties got up and was putting on his coat. His wife says, "Where are you going?"
He says, "I'm going to the doctor."
She says, "Are you sick?"
He says, "No, I'm going to get me some of those new Viagra pills."
So his wife gets out of her rocker and puts on her coat.
He says, "Where are you going?"
She says, "I'm going to the doctor, too."
He says, "Why?"
She says, "If you're going to start using that rusty old thing, I'm going to get a tetanus shot."