I've just done a little research, and if i do have dyscalculia (yes, PB, I will do my best to get this confirmed), then it explains why I can't read maps, follow directions or - most importantly - park my car. That bit of my brain is a little bit broken, apparently.
So there you go, dad. This is why I scraped your car against a large cement bollard aged 18. You can't shout at me: it's politically incorrect.
Mwaha.