One of the things I like most about playboy/penthouse...is their themes they use on a shoot to shoot basis.
They might have two cowgirls, two goth, 18th century dressed woman...punk chicks, rock chicks, strippers...you name it...they've done the theme.
Would it be possible to incorporate these different themes into your shoot. They require little to no back story, but the girls that penthouse shoots stay in character during the shoots.
the goth/rock/punk chicks are usually hard and abbrasive, while the 18th century girls remain soft and delicate.
would be a real turn on...but maybe the site hasn't grown to that kind of thing yet?
I dunno...would require costumes and a kick ass make up artist.