Stereotypes exist because they're real:

In store. See a couple come in. Woman is a fat, tattoo wielding, shaved head having, problem glasses wearing, bull dyke looking meme leftist. Guy is a skinny, soy beard having, glasses wearing, nerdy looking meme male leftist. Female made the order, and I heard her say to the soy, "I told you at home..."

Textbook leftist couple. 90% chance they're in an open relationship.