I think it really does have a lot to do with how you are raised. On that point I agree with yaw'l. And on the other hand most women will hold the door for me also. I make it a point to say Thank you.
chivalry ain't dead.
Those that were taught manners will always have them. Most still choose to use them.
By the way, I'm Southern Baptist, so karma is just shorthand for "you'll go to hell if you don't follow the golden rule".