In episode 12, season 2 of the series "friends", there is a letter for Joey from a woman. In the P.S. she wrote:
P.S. Enclosed, please find 14 of my eyelashes.
From this they deduced that the sender is married.
RACHEL: Ya know, in crazy world, that means you're married.
From what I found in my search, I can say that sending a lock of hair to someone is showing love to that person. But how does this mean being married?
EDIT: Here is the full transcript. Please read the scene right after the "OPENING TITLES".