This so fucking much. Is it so hard to write half decent mc, it doesnt have to be gigachad mc but someone who functions more than half a brain.
The vast majority of the time it happens, it's when the main girl looks like Shirogane (i.e., long hair, busty), and there's (often forced, it seems these days) competition in the form of a washboard/loli. MCs
don't do this when the female lead looks like that other girl.
That being said: from reality to the pages of manga, it seems that it's always flat women shamelessly trying to show off how little they have.
"Ah, you were looking at my breasts, weren't you?"
What breasts? The fact that she doesn't have any is almost the entire reason she's in that manga.