Em... What do you think before you had a baby from "fool"?
— — — —
Hello, my name is Petya, I am a fool. Let’s go to sleep?" My dear, when everything is normal and there are no force majeurs, then most people are decent and good angels. Years are decent and kind, and rot can only come out when seriously pressed. Do you offer to artificially arrange serious problems in advance, before conception, in order to check? How else would it be done so imperceptibly, so that it does not seem to be a misconception itself?