Why do parents become eccentric after a younger brother appears at home?

First of all, because many parents actually prefer boys to girls, after all, traditional thinking thinks it is better to have boys. They think that only their sons will accompany them when they are old, so if there are boys at home, they should try their best to be kind to their sons, so that they can be kind and filial to them in the future, and let them live carefree in their later years without worrying too much.

Secondly, because many parents are eccentric and small, they hope to share more love with their younger children when they appear. This is an uncontrollable amount, because they will think that their younger brother needs more care, but you are older than your younger brother, so you can take care of yourself and sometimes help them take care of their younger brother together.

Finally, it is because your parents think that you should love and care about your brother as much as they do, because your brother is the youngest in your family, but in fact you are just a child, but your parents have unconsciously favored you two.