Sign and significance

So I was watching “Sense and sensibility” yesterday.

Did you know that in Jane Austen’s time (the book was published in 1811) in case of a mutual romantic interest between a man and a woman it was a custom for the man to cut a lock of the woman’s hair as a declaration of their shared feelings and that was considered an act of intimacy?

That probably wouldn't have impressed me as much if a few hours before that I didn't watch a few “Sex and the city” episodes. The ways of today's society change not in steps but in leaps. I cannot even begin to imagine how things will be different in just, let's say, 20 years from now.