He is famous for writing “The Parts That Were Left Out of the Kennedy Book” (1967), “My Acid Trip with Groucho” (1981) and for designing/and/or/distributing the FUCK COMMUNISM! (1963) and Disneyland Memorial Orgy (1967) poster.
He was severely criticized by Robin Morgan in 1970 in “Goodbye to All That“:
“Goodbye to lovely “pro-Women’s Liberationist” Paul Krassner, with all his astonished anger that women have lost their sense of humor”on this issue” and don’t laugh any more at little funnies that degrade and hurt them: farewell to the memory of his “Instant Pussy” aerosol-can poster, to his column for the woman-hating men’s magazine Cavalier, to his dream of a Rape-In against legislators’ wives, to his Scapegoats and Realist Nuns and cute anecdotes about the little daughter he sees as often as any properly divorced Scarsdale middle-aged father; goodbye forever to the notion that a man is my brother who, like Paul, buys a prostitute for the night as a birthday gift for a male friend, or who, like Paul, reels off the names in alphabetical order of people in the women’s movement he has fucked, reels off names in the best locker-room tradition—as proof that he’s no sexist oppressor.”– “Goodbye to All That” (1970) by Robin Morgan
The entire issue where he is depicted with a spray can of “instant pussy” referred to, can be read here.