I remember a case from my youth when I was wearing wide pants and an old sweater. There were a couple of thousand in my pocket (well for a month +-). And I was friends with a beautiful, smart and rich enough girl.

Years later, I remembered her. She taught me to drive my car (I had no rights and experience), at night (I and she worked during the day), and in one of the trips she showed me four secluded places in the city to do "interesting" things. And I am so naive "mmmm cool place, and there are other interesting places?"

So, a year later, I truly realized that I was a complete idiot.
Well, after a year, I can safely say that I have in any case avenged for somebody’s “friendship.”