In regard to marriage....Let's not be ridiculous. You're making it all about sex....and it is not.
of course it is...that's what makes marriage an inviolable relationship...two become one, what God hath joined let no man put asunder....Marriage is a unique Sacrament which joins two people into a single unit which cannot be separated. A marriage which cannot be consumated, for example, is not a valid marriage and can be anulled...it has a lot to do with the sexual aspect of the relationship.