The car

I did the What Sex is Your Brain? quiz on the BBC website yesterday, and discovered that I am 25 on the male side. But then this happened:

I just decided to put some petrol in the car (Mum & I share it so it was the first time I'd done this). I was just congratulating myself on driving in so the pump was the same side as the petrol hole, when I realised that I couldn't get the cap off the petrol hole. The outside was fine, just unlock the cover, but the inside thing refused to screw off or pull off. I ended up standing there with the instruction book, but still couldn't do it. In the end I had to give up and drive home. Still feeling extremely embarrassed.