The Ritual of Marriage

I find it strange that Christians seem to claim that marriage only happens in the church. But what about other cultures and religions outside of Christianity. Do they not also get married and have their own set of rituals? Who has the right to claim the marriage ritual as their own and no one else's? To me it seems the ritual is part of our human psyche, a symbol of the bonding between two souls, regardless of what culture we're born into.