Киска летучая мышь / Bat Pussy (1971)

Bat Pussy, a female superhero, defends Gotham City from a middle-aged couple making a pornographic film.
Reviews by the experts in porn:
The Snipe described Bat Pussy as “the boner-killer of all time[…] Only a psychopath or possibly a replicant could withstand let alone enjoy a document so barren or unflinching in its contempt for humanity”.
Radiation-Scarred Reviews wrote “This is the sort of sex film you show teenagers to encourage abstinence because it just makes the act of fornication seem so repulsive, so utterly disgusting that it seems unthinkable to perform”.