I used to live with roommates and we’d occasionally walk around in our underwear. Sometimes I would walk around in my underwear with my pants around my ankles. It was hilarious how uncomfortable they would get, even though I was wearing more clothes.

The socks imply being dressed without actually concealing anything, so someone wearing only socks isn’t just naked but rather naked while intending not to be. It’s like how lingerie is somehow more revealing than plain nudity.

Where you wear the sock(s) could be a factor.

“Socks before or after trousers, but never socks before pants. That’s the rule. Makes a man look scary, like a chicken.”

Put on a maid outfit, no undies. More naked yet still!