It sounds superficial, but in a way, it is a method to ensure a secure relationship and to ensure a secure family in the long run.
Just imagine, if you hold a party, and your guest come empty handed - they have your food, your wine, your place - and after the party, they just leave. For how long can you sustain it ? In terms of money, psychological support, help and care, no matter in what format, we ought to provide something for each other, and at the same time, be independent.
Love and support should to be reciprocal, as we need to grow together, to stay forever.
~ Toni