Interesting question Your Grace. I think that this isn't a question of Judaic-Christian principles. Instead, I believe it is the compression of time, or something else, which I will describe...eventually.
Deena made the videos you referenced for John Graham Productions and these were marketed and distributed by H & S Sales, now called Xavier Productions.
Deena Duos was one example. Tiffany Towers was another model who was first brought to the small screen in a video called The Girls of Daytona by H & S, and that video helped her career take off. Then Graham shot video of her in the Bahamas as well as London,& she performed with the same guy named Robert. Candy Canteloupes ditto. Even Lisa Lipps first two XXX Videos - Her first was Palm Springs or Bust she was known as Starry Knights then, her next was Boobarella shot in the Bahamas. In these two, she performed with the same guy, a blond guy.
Here's my theory: these gentlemen were the models' boy-friend du jour at the time Graham made the videos. As their fame and fan-bases grew - they began traveling as feature dancers. Then more offers came rolling in. Lisa Lipps, Tiffany Towers, and Wendy Whoppers were three models who began with Graham and H & S. Graham and H & S were also linked together with SCORE. Score was the third of the platforms to bring these models to stardom. Clubs, Print, & Video are the chief means to maximize the models exposure.
So while with Graham/H&S/Score - their male counterparts were always the same guys. Later, when these models worked with other production companies, they performed sexually with a large variety of porno studs.
So either these guys were the boy friends of the moment (Compression of time) OR they were the hired studs working for Graham to service the models.
As for Minka - she explains it succinctly. When she works for a production company as a hired model, she has no control over her amount of time on screen, or how the scene is shot, or who she performs with...when she did appear in some H & S productions, she did perform with her long time partner Woody. Of course there were a couple of others too. But in her OWN productions, she has performed almost exclusively with Woody.
Woody & Minka - Robert & Tiffany. Name your combo. We may never have the real reasons so this is just my theory.
JustMeMike 