Ever thought of the psychological effects of constantly watching men pound (no other way to put it really) women in front of you while not getting any yourself? - That is what the viewers are subjecting themselves to, they are essentially masturbating to someone else fucking a woman in front of them, think about the effect that has on them.
Yeah for sure I've been thinking about it for awhile now, this is why I was able to stop for good, when I realized what it was doing to me, in a way it was telling myself I don't deserve sex.