I think I understand both sides of this situation. Here's how I see it:
This guy is a well known sleaze. It's like the dog who bites metaphor above. If you go to "Uncle Terry" as an unknown aspiring model, and want him to shoot your modeling portfolio, you should know what he is and should not be surprised when the treats you like a whore. His reputation precedes him. Sorry, but it's the truth. You should go elsewhere.
On the other hand, if it's a paid job, and he has "creative control" and can hire whomever he chooses, and he insists on a pound of flesh, so to speak, or else you won't get the job, then that is coercion. It's unprofessional and likely also illegal in many countries.
illegal doesn't make things immoral. Although I wouldn't get women as such, I don't think it's wrong for him to work how he does(although many will disagree with me). Point is, YOU DONT HAVE TO DO THE JOB.
just like folks who want to take naked photos in the name of art. People who truly don't want to have sex with this man, won't do it under any circumstances. Forget who you are! It's like a woman wanting to kick it with the rock band, well chances are, you're going to have to give something up, do you still want to kick it with the rock band(because you liked them/ because their famous/ because they might put you in a song). If you don't want to have sex with this man, don't deal with him and blame it on him when he asked you to have sex, and you OBLIGED. whatever the reason may be. People that have principles, tend to not change them. Thats my just my 2,4,6,8 cent