Should couples co-own everything? ( Sharing is caring)

There have been arguments on whether couples should share property and I feel people are ignoring the sharing trait which we were taught in school. The act of sharing has been attributed to the sprit of showing someone that you actually care for them.  Why should sharing material things be an issue in a relationship? What happened to the common English saying ‘sharing is caring’?
Doreen umutesi
Doreen umutesi
Doreen Umutesi