There is sexual exploitation - some of it is obvious. Be prepared to avoid the obvious. I can't imagine that anybody still believes that. You can get sex anywhere these days, the 50's are over. The 40's are over.
People sleep with each other now.
It's just not done, it's just not needed. If you want to have a relationship with somebody, if you want to go to bed with somebody, feel free. But don't think it's going to get you an acting job. As an actor you want to work. The supply and demand in acting is way off balance and a lot of bizarre things can happen.