this is so dumb. The term has been used for a long time. Significant Other is a gender neutral term that can encompass someone intimate relationship partner regardless of marital or relationship status. It had nothing to do with same sex couples initially.
Allegedly? It's not like the first gay marriage to ever happen in the world was in 2001 in the Netherlands.... Or the first state to legalize gay marriage in the US was in 2004.
Dumbasses are just saying shit just to say shit lmao