Ephesians 5:25: "For husbands, this means love your wives, just as Christ loved the church. He gave up his life for her."
This moment at a Catholic Wedding shows the Priest offering the Eucharist as a re-presentation of Jesus' Sacrifice for his future church. A husband must love his wife, dedicate his life to staying with his wife, and be willing to die for his wife if need be.
Husbands are called to a level of dedication which includes love unto death.