Why do people encourage you to talk about brotherly love?

This depends on the specific situation.

Funnily enough, my mother is very supportive of my sister-in-law relationship. Because she seems to have found someone before, saying that I'd better find a boy one year younger than me, so the attributes are similar. In fact, before I made a boyfriend myself, my mother was not so superstitious, but a year later, I made a boyfriend, my age, and finally broke up. My mother especially believed what the fortune teller said. That person said that my first love ended badly.

Then my mother was caught in the door. Ask your age when you have a boyfriend, and find someone one year younger or three years older. After that, blind dates always introduce me to boys who are one year younger than me. I am also very helpless. Actually, I understand my mother very well. She wants my love life to go well. After all, it was her hard work.

In a word, my mother encourages me to fall in love with my younger brother and sister because she wants me to suffer less emotionally and because she believes in those numerology theories.