Alex337:
since we can look at marriage being different to matrimony
I wouldn’t quite use the word “different,” because they are essentially the same thing. I don’t even typically use the word “matrimony,” although I recognize that it is a valid word to use. Instead, I tend to refer to “sacramental marriage.” In other words, the sacrament of marriage (or matrimony)
is marriage, raised up to the level of a sacrament.
how is a gay marriage a mockery?
It uses many of the trappings of marriage, even the name “marriage,” to solemnize a union that by its very nature can never be a marriage, because that union is lacking the most fundamental ingredients of a marriage, which are a man and a woman. It also is a union based on homosexual acts, and those acts in a sense are a mockery of sexual intercourse.
Based on other posts you have made here, I don’t expect you to agree with me. But I am answering your question.