Latvian man no find wife. Try to get pregnant give birth with Latvian Virgin Mary in dream. Want to trade baby for potato. Latvian man in labour. Push hard. Is not baby, is rokk from kidney due to malnourish. Such is life.
... i think it comes down to more of what is a person memory and experience of the given Didi dun do pshh sound.
personally ... i like the "do pshhh" but "Didi dun" doesnt bring the required sound refrence. maybe something with a deeper sound resemblance like Dada dun do pshh?