I learned about porn when I was on a slow ass Mac in the school library and tried to go to yahoo.com but instead, because the first few keypresses failed to register, went to "hoo.com" (at the time some obnoxious porn site, not a crypto exchange.)
I closed the site before an adult saw me, then visited it in the privacy of my own home later.
We used a Mac at home too so I didn't get a virus.