It's how they recruit. For every 1000 people who read that, 1 or 2 are far enough gone that they just got pushed over the edge to try it. There are a few dozen who clicked over to some porn site to watch it and see. There are a few hundred who just thought "hey, my kinks aren't so bad," and lowered their standards slightly with this new thought stuck in their brains. And finally, there are a few hundred more who got totally disgusted by it and rejected it outright. They're also attention whores.