Check the top 1000 books on Amazon. Most of them have a shirtless guy on the cover, because they're smutty "romance novels" (read: porn for women) about a girl being swept off her feet by one (or more) billionaire alpha-males. There are literally tens of thousands of books out there about shirtless billionaire alpha-male vampires who can't wait to mate with you. Lucky you! And women eat that shit up! Men, not so much. Men prefer to watch actual porn.