Marriage is a term that widely used by most societies.

It is commonly defined as a wedlock between a man and a woman.

Holy matrimony is a christian term, believed to originate from the Catholic Church, as a blessing.

Marriage defined, is a joining of two opposites.

Our steel workers perform more marriages in one day, than a pastor could do in his life time.
The marriage of steel is performed by notching two pieces of metal, so they will interlock into place, before the weld is made. This technique is used to forever bond them.

The same goes for our brides and grooms. There is a locking mechanism that exist physically, but it is the spirital bond that keeps them together eternally.

Finally, there cannot be a marriage between similars. They can be attached, but never married.