Ladies: if'n yer gent ain't a provin' his love, well, the honeymoon's over...
Does he still run out in the rain to open an umbrella above your head? If you wait by the car door, does he spring forth to open it?
Gentlemen: make proof of Love an everyday occurrence, and by simple force of habit the bond will be formed, able to weather inevitable droughts and clouds of locusts. Every day you neglect the proof is three days to get back to where you were. Do the math.
Marriage, while beneficial to both parties, is particularly beneficial to the man: health, wealth, and happiness flow as a byproduct of marriage maintenance. Do your part, secure your future--and that of your progeny. Appy Adam Smith: attend to your wife for your own selfish reasons and, by gum, the whole marital organization and economy will benefit.
Remember, men: There is no such thing as Love, only proof of Love.