In ancient times, when a man married a woman, the woman went to the man's house to propose marriage, and then the two sides discussed the marriage. The woman usually gave the man a bride price, and the man gave him a gift. The wedding reception was arranged by the woman at the woman's house. After marriage, the man also lives in the woman's house, and the difference between the woman and the man is only the role exchange.
In modern society, the man's adoption is only a change of the household registration and the surname of his descendants, which is not much different from the man's marriage process, because most newlyweds are separated from their parents after marriage and don't care so much about the idea of carrying on the family line.