"Don’t trust anyone over thirty"

I was studying at university when I first heard this saying. Back then I liked it a lot, but when I hit my thirties, I became unable to trust myself. Technically I am still thirty (if I round my age to tens), but my peers have already started complaining that they cannot understand what their students are thinking anymore. It may be inevitable, since we are now more than twice their age, but to tell the truth, I do not feel affected by getting older. When I wondered about the reason, I realized that I could not understand other students even during my university years. For some reason I ended up talking about age, but anyway, this is my general attitude when I conduct research or teach classes on ethics. I will soon hit the word limit, so let this paragraph serve as my introduction.