Medic ... Bashny.Net

I'm a programmer, and my wife is a doctor (important for subsequent history). Our son four years old recently came up with a new game yourself.
I do not know how he came to it in the head, but by analogy with the words "mother" and "father", he began to change and other words:
 - If Dad has a shelf for books, then my mother must be Malka for books. If the mother has the soap, then the Pope should be pylo. If the Pope ... - and so on for an hour. When nouns ended, he took the verbs:
 - If the mother frowned, the pope porschitsya!
Or even:
 - If the mother meows, the pope pyaukaet.
However, the final chord of this outrage was:
 - If the mother a doctor, the pope fagot.