Porn comes from pornē, Greek for prostitute. So at least etymologically (and arguably logically as both involve sex for money) porn is prostitution.

If that’s accepted, then I find it hard not to also accept OF as a form of prostitution.

School comes from skholē, Greek for "leisure" or "spare time.".

Therefore people can't be stressed for finals at university, since it's all leisure!

“Etymologically, X comes from Y, therefore X is a form of Y” is quite the jump in logic...