Aries male: Give the other half a living guarantee.
Aries men are not selfish boys, they are very considerate of others. Therefore, in the matter of buying a house, they will also think about how girls can live alone in case they finally part ways. Boys are better, you should make way for girls. So whether the other party pays or not, he will definitely write the other party's name.
Lion Man: Providing a sense of security.
The lion man just wants the other half to believe in himself, so that they will marry themselves. If you don't write the other person's name, this is naturally possible. But if people don't say it verbally, they will definitely have opinions in their hearts. Then you may have to dump yourself and not marry yourself. So in order to firmly grasp each other, the lion man will choose to write each other's names.
Libra man: avoid disputes.
Libra man is the kind of person who is considerate. After all, many feelings collapse when talking about marriage, especially when it comes to some interests, which hurts feelings. So in order to avoid some unnecessary disputes between the two families, Libra decided to fill in each other's names at the beginning of buying a house, so that there would be no family conflicts.