I think people ought to be more mindful of the fact that just because you're inside your car, doesn't mean people outside your car can't see you. Also, just because you can't really see past the big row of windows you're parked in front of, doesn't mean the people that are, by the way, on the other side of them, can't see you.

So...

By all means, express your love for your girlfriend, but do consider that picking her nose for her--in public no less--is not necessarily the best expression of that love.