“Father,” says the man, “is it okay to have sex with my wife face-to-face?”
“Yes, my boy,” answers the father, “and you can do it as often as you like.”
“What about if we did it doggy style or spoon fashion?” asks the boy.
“With my blessing, yes, it is okay.”
“What about standing up?”
The father becomes gravely serious, leans in close to his son, and says, “No, because it might lead to dancing.”