On the Road to Matrimony

A hand written note amongst Nan Doe's postcards dated 27 January 1907

"On the Road to Matrimony
12 Nods = 1 smile
12 smiles = 1 meeting
20 meetings= 1 kiss
500 kisses = 1 proposal
2 proposals = 1 engagement
1 engagement = 1 marriage
1 marriage = 30 years misery
30 years misery = 1 funeral
1 funeral = happiest day in a man's life"

Seems to me that it's a long way to the first kiss. Considering that at that time people were married quite young, Ten thousand kisses means that they had to be going at it pretty well to get to the proposal. Just how long does that take? And why is it the happiest day of a man's life? What if she outlives him?
obviously, women's lib was some way in the future.