Yes, I actually have said this..

"Stop growling at your sister."
"Get your hands out of your pants, it's disgusting."
"No, you may not have cookies for breakfast."
"Who peed in the vent?"
"If you are going to play with yourself, please do it in your bedroom."
"Never trust a fart, something else may come out and surprise you."
"We do not play with your brother's penis."
"No, I do not have a penis. No, it doesn't tickle when I go over bumps."
"Leave my breast alone, go play with your own."

.... I have many more sayings.. and I will leave the rest for another post :)