Why are men so generous with money and women so stingy?

Because women often think about future expenses, while men don't pay much attention to this aspect, can you care about money in brotherhood? And now many girls are also in this situation. Under the affection of girlfriends, I can spend casually. There are also many boys who arrange their money reasonably. In fact, this is not fixed, but a woman keeps the house in the traditional sense, so it gives people a feeling of haggling over every ounce more often.