Soccorro: I do occassionally drive, I have to... I'm the sort of mastermind, who is able to forget how to ride a bicycle.
I've never been able to bike well, which is a serious issue here in the Netherlands, where everyone bikes. It's mostly because I have a messed up sense of balance, though.
Driving in a car was difficult for me at first as well, but it's definitely a case of practise makes perfect. I drove A LOT the first year and a half after I got my driver's license and it helped so much. Everything eventually becomes automatic. I can now go several months without driving and still feel right at home the moment I get behind a steering wheel. Sure, I'm not the best driver in the world, but most things are fairly easy for me now.