Because in Christianity, marriage is regarded as eternal and sacred, symbolizing the relationship between Christ and the church, and people who cooperate with God are inseparable, so Genesis records that "because people leave their parents and marry, they become one", so husband and wife are no longer two people, but one person. Because of this concept, weddings are usually held in churches, receiving the blessings of priests and people, exchanging rings and exchanging each other's lives before God. Buddhism does not. Aren't monks usually monks?
The Bible "Song of Songs" 8: 7 says: "Many waters of love cannot be extinguished, nor can floods drown them."
Only Christians can get married in church.
But now, in China, as long as you pay more money ... Amitabha, sin.