Strictly legally speaking, sure, but marriage is much more than a legal contract in reality. The ceremony, living together, commitment etc. is most of the defin

Strictly legally speaking, sure, but marriage is much more than a legal contract in reality. The ceremony, living together, commitment etc. is most of the definition of marriage. That activity your describing has been called marriage for thousands of years, with or without legal components, and just because some people are doing it now without making it legally binding doesn't make it something fundamentally different from marriage.