Mid 30s, USA. I'm smart (Ivy League science doctorate) but I can't drive a standard transmission because my dad "couldn't teach me" because I "wouldn't learn right". It was just me asking him questions like "What does the inside of the clutch actually look like? " and him yelling "That doesn't matter, just ease out on the clutch while giving it some gas!" Apparently I can be taught a lot, but not how to drive a standard.
Weirdly, my engineer friend let me drive his standard transmission car once after giving me some basic instructions and I did okay going up and down the road alone, but that was just one day and I fear I've forgotten everything. But I must be mistakenly remembering that, because according to my father I "can't be taught!"