Is it normal that i get turned on seeing my girlfriend climb on someone's car?

My old girlfriend used to get me so excited when she would sit and model herself on the hood of someone's car in public. She would sit there, or stand up, or even walk around, hopping from car to car.

When we would go out on the town, downtown, to a couple clubs, she would come out feeling no pain, then climb up on the hood of some car on the street. You could still hear the loud music from the club, and she started to dance, gathering a crowd. She was flashing her tits, and this was the first time I got freaked. I just wanted to get out of there, but she was hard to get down. Luckily another girl got up and danced on the car parked behind the on my gf was on, and when she started to flash her panties, I took the opportunity to talk her down. We ran back to the parking garage, and had sex on the first car we saw on the level we were parked on.

Normally she would just hop over a couple cars here or there, or even sit on the hood of a friend's car while tailgating or hanging at the park, but it stared to get nerving.

She grew up around cars; her whole family into repairing them or car dealerships. My car was so dented and scratched from her after 6 months or so dating her, but she was worth it. This may be extreme example, but wondering if others got off seeing girls on cars too.