Why a man is supposed to spend 2 months salary on an engagement ring.
The idea that a man should spend about two months' wages for an engagement ring originated from De Beers marketing materials in the early 20th century, in an effort to increase the sale of diamonds.
Congratulations to anyone who ever fell for this outrageously expensive ploy.
An ad told all the dumb swooning men that they need to give them more money to prove their love and it actually managed to become ingrained in our culture.