You can get stones at any age - my first was when I was 12, my second was a few months back, and nothing short of morphine ever kept the pain away. Drinking seemed to make things worse for me, presumably because urine was backing up in the kidneys/urethra behind the stone/blockage, though taking fluids seems to be the general advice people get.
Best part is yet to come - pissing out bits of stone that shred the pipes of your old man on the way out, though you might get lucky if the stone or its pieces are small enough.