I'm a female-passing (afab agender but that's beside the point) physicist. I do this when men (honest to god it's always been men so far) explain something to me that i obviously know better. Like for example they'll know I'm a physicist but explain to me that water boils at a lower temperature in the mountains or something like that. I'll just play a game to see just how dumb i can get them to think i am. Pretty dumb is usually the answer.