To be short, no, there isn't too much sex in popular culture yet, and there won't be until explicit sex becomes acceptable in manstream media. If people want booze and sex, and be stupid, they have full right to, and the media will indulge them, of course.
The media will always supply what is in demand, so long as it isn't stopped by law. And in demand is sex, because people are horny. The more people consume sex media, the more the media presents sex, until the people tire of it, a phenomenon very unlikely.
Like violence, sex in real life happens a whole lot more than it does on TV or in film. If this entertainment media is to imitate or reflect real life, it's going to have to have a lot more sex and violence than it does right now.