>>61642404that's just the disguise they wear today anon
back in the boomer age (actual baby boomers), glasses, book autism, and even just a bit of thickness were enough to filter the normies. but around the 60's in particular, people slowly caught on to them, discovering the intense sexual energy the librarians were trained to subdue. they quickly became a normal feature in pop culture, cartoons, music, and movies to highlight their fuckability.
by the 70's and 80's most librarians were ripe targets and getting impregnated multiple times, often in the libraries during work hours. turnover was frequent as most librarians became stay at home mommies instead (because who tf would bother being a preggo librarian for the pay with several kids at home?)
so to preserve more librarians, they applied more advanced tech in the modern age, including state of the art make-up and hag features. it appears to have worked, since fewer people go to libraries anyway to catch them in the odd hours where they drop the facade to furiously masturbate.
eventually more advanced chads will be needed to unravel the hot fertile babes beneath the advanced granny disguises and restart the procreation engine they fueled in the late 20th century.