Historically speaking, most cultures have traces of marriage as based in capture, and presumably rape of the abductee.
One arguable origin of the wedding ring is as a miniturized version of the shackles used on the woman being abducted.
The historical background is there. To bring these historical facts into today's world and try to use them to somehow invalidate the institution that provides the most protection for women and children is utterly repugnant.
Most culutres require a dowry. Odd sort of rape that.