Very interesting. I would call that the process of how traditions and social conventions emerge. There are a lot of rules that might seem pointless today, but to which people still stick, because they got it taught themselves - while being not sure anymore why they show a certain behavior themselves. Although, in todays society most of these traditions get abolished, may that be in the form of laws or by the cultural coding which increasingly turns to "anything goes".

An example would be homosexuality, certain sexual practices like anal sex and also incest. Today, the most of the possible negative consequences coming from these behaviors are so limited that there seems to be no more need for outlawing them and people don't understand why this has been the case.

200 years ago though, there were no contraceptions, there were no antibiotics and having many children or children at all was essential to survive.

My guess would be that the process is the same as it is in the monkey experiment and that it would take a lot of group effort to remove their new "cultural coding" of "don't touch the banana" again.