Do you mean that sex ed classes should discuss how porn affects expectations of sex? That does seem reasonable.
Yup. Reasonable, and perhaps even required. Similar to sex itself, aside from "abstinence only" positions on porn, there's very little open or fact-driven discussion about it.
Not sure there's a choice. The allure of the taboo draws people in, even when they are not interested in the acts themselves.
We should instead tailor education to assume that boys and girls will find a way to access porn.