It evolved from my experience in the fifties, growing up during the McCarthy era, and hearing a lot of assumptions that America was wonderful and Communism was terrible.
If you are a woman, you might feel torn between logical agreement and emotional resistance. Why? It seems like a simpler solution to blame men for the pay gap than to engineer your own bridge to higher pay.
Our main reasons for fearing males having sex with males is that you really had to construct a more powerful social role to keep men in their place than you did to keep women in their place.
You could make a case that women addicted men to their sexuality and then withdrew their sexuality until we provided them with a source of income.