I thought about it some more ...
Everytime we try to explain something we have learned, or we expose someone to something that they have not practiced or encounter before .... we have pushed them beyond their theoretical limits.
In the broad sense of breaking barriers, extending limits .... I would have to change my vote to a big .... YES.
That is, barring physical exhaustion, or turning someone into a basket case either mentally or phsically, that would be plain mean.
Since I have become a gorilla, weighed in over 250 pounds and showed many grey hairs, people have been quite a bit more polite than when I was somewhat skinny?
There must be a physical fear factor in there somewhere?
Another flaw of our society, and theory of natural selection?
Another subject for another thread.