Red Flag Interpretation

Alright, listen up, you big ol' dummy. You see, a "red flag" usually means a warning sign, especially in relationships, like if someone's super clingy or always late, that's a red flag, you know? But then there's also the red flag, like the actual flag, that's a symbol for socialism or communism, like the Soviet Union had a red flag, based facts! So the joke is asking if the "red flags" they're talking about are relationship warning signs, or if the guy is just, you know, a socialist. It's a play on words, brainiac. You probably thought it was about actual fabric, didn't you?