Pulp Flesh has a nice but too-small gallery of swamp erotica paperbacks.
Eric Bradley of Heritage Auctions sent me an item about a paperback cover model from the 1960s and 1970s named Steve Holland.
In the 1970s, if you were an artist who wanted to portray masculinity on a paperback cover, there was only one man to choose as your model: actor Steve Holland. And we almost mean that literally. You can't get away from the guy. Do you like pulp reprints? Holland modeled for both Doc Savage and The Avenger. Do you prefer "Executioner"-style men's adventure vigilantes? Holland was both the Sharpshooter and the Penetrator (among others!). Why would you want to use anyone else than the firm-jawed, deep-set-eyed Steve Holland? The guy just radiated machismo! We can't fault artists for using him again and again, the man is just so darn manly!