Social changes in the US in the late 1960s led to standards of social behavior, in general:
After the late 1960s, people were more likely to treat a stranger on the street, on the average:
After the late 1960s, people were more likely to treat a cordial acquaintance who is not a close friend, on the average:
Compared to how things were in, say, 1965, a woman's appearance is:
Compared to how things were in, say, 1965, a man's appearance is:
Elaborate in the comments if you'd like, by all means.