I guess people in Brazil simply don't care much about that... this weekend a friend of mine saw a guy bumping his motorbike with a car (trying to park) when we were at the beach, and he didn't seem to care... he even commented at the time: "as long as he doesn't hit it strong enough to make the bike fall, I'm not bothering to get up from this chair and walk there to talk to him".
Yes, there are people who do care, but anyway...
I agree with JO53PHS, about almost everything including "I wouldn't dare make contact with another person's car". I didn't intend to do it either while I was parking, but if I didn't, I wouldn't get the car straight. This was the first and only time I ever touched someone else's car when parking, and that's just because there really wasn't anywhere else to park. The beach is a very crowded place on weekends, and the place I parked was already kind of far from where I needed to go.
I guess every person is entitled to their own opinion...
Edit: my car is brand new. I can still smell the "new car" air inside of it. I've had it for about 3 or 4 months, although I've had my driver's license for a lot longer.