How old are you when you watched your first R-18 movie?

I know a friend of mine who is such a late bloomer that she watched her first R-18 movie at age 25. In my case I was able to watch my first R-18 movie at age 10 and that movie is Schindler's list. It is a traumatizing movie for me to watch but it makes me learn a lot about how harmful is war.