Now everyone just does that stuff for us, but because it comes from the bridal half of the tradition, weddings are still thought of as the bride's deal, not the groom's. Hence, the bride's family traditionally hosting (paying for) the wedding and the nasty Hollywood hetero-theme of the bridezilla who plans every aspect of the wedding as the groom sits idly by vaguely dreading marriage.
That's right! Traditional wedding invitations are another way in which the "under classes" have over time sought to emulate the 1%. Meaning that all of the big elements of weddings have their roots in social elitism, economic disparity, and/or the dehumanization of women.