By dangerous, you mean that the acting in Twilight and 50 Shades, right? Haha, you're more in danger of just wasting money on them.
As far as movies of that genre, 9 1/2 weeks and Wild Orchid were much more of a challenge to innate perversions. The 70's and 80's were much sexier and better acted. Today's attempts at perversion is just poor attempts. Like the twerking Miley, Madanna and Cindy Lauper were much better at it. Nothing is new, and nothing shocks me with this new group of kids that everyone gets hysterical over. It's just not done with the same style and craftsmanship that it once was. Madanna humped a priest, Miley just looked stupid, IMO. Haha!