Because the flirting is working?

Like a male bird showing off an ornate and colorful tail to attract a mate, the male nerd demonstrates his earning potential by being excessively nerdy.

People around here acting like being a nerd doesn't attract women.

She laughing at the guy's fashion choice of wearing more pants on his torso than his legs?

Perhaps she owns a shitload of stock in the RAM and AI companies, is making mega bank off of this shituation, and is delighted to be reminded of it? Or maybe she's just super high. Who knows!