Operation left Man 'Gay'

A boy comes home from school and says to his mum, "Mum I've got a problem at school"
She says, "Tell me, honey". He tells her that the boys at school are using 2 words he doesn't understand. She asks him what the words are?
The boy says, "well, pussy and bitch".
She says "Oh - that's no big deal, pussy ... is a cat like our little Mittens, and bitch is a what a female dog like our Sandy is called."
"Thanks Mum!" he says, and goes to see his dad in the workshop in the basement: "Dad, the boys at school are using words I don't understand, and I asked mum and I don't think she told me the right meaning.
Dad says "Son, I told you never to go to your mother with these matters, she can't handle them. What are these words?"
He tells him: "pussy and bitch."
Dad says, "OK" and pulls a Playboy magazine down from the shelf, takes a marker and circles the pubic area of the centerfold and says, "son, everything inside this circle is pussy."
"OK dad, so what's a bitch?"
"Son" he says, "everything outside that circle!"