Smart man smart woman = romance
Smart man dumb woman = affair
Dumb man smart woman = marriage
Dumb man dumb woman = pregnancy
Smart boss smart employee = profit
Smart boss dumb employee = production
Dumb boss smart employee = promotion
Dumb boss dumb employee = overtime
PROPENSITY TO CHANGE
A woman marries a man expecting he will change, but he doesn't.
A man marries a woman expecting that she won't change, but she does.
A man will pay $2 for a $1 item he needs.
A woman will pay $1 for a $2 item that she doesn't need.