In answer to the question you were asked, "Why do men need to put sex [and violence] everywhere ..."
I don't think that "men" really do ... sex and violence (and pretty much anything controversial) sells. As long as people are
buying it and/or
talking about it ... it's going to be used as a sales tool. Women use sex to sell just as readily (if not moreso) than men.
With regard to why do we watch it or look at it. I would say that watching violent scenes is a form of
schadenfreude. (<-link to definition.)
As far as sex goes ... we like sex and for the most part we want to watch it. And there are PLENTY of women who watch porn and are not turned off by it.
It is (or can be) as simple as socialization when you get right down to it.