That's very subjective and I don't know if it's actually true. It doesn't *feel* true.
I enjoy coming to the defense of people who appreciate it and I don't know if men are so different.
If the "lady" slams the door in your face, when you try to hold it open for her, but the prostitute says a polite "thank you" and looks happy that you helped her, who would you open it for first, the next time around?