Women of Ask Lemmy, what are your thoughts on this phrase, "if the bra and panties match, you weren't the one who decided to have sex tonight."

Had a 'big sis' friend tell my naive and timid ass that saying a couple decades ago. Got reminded of it (not like that) today and had a chuckle.

For context, if a woman is wearing matching bra and panties it's likely she knew you'd be seeing them later that night.

So, I'm curious, you think it's true? Any other thoughts?