There isn't much time, drug resistant STDs are already here, and they will only increase. Yet sex education classes and popular culture ignore this fact. Since untreated STDs can result in sterility, it will become one of the several reasons for a demographic collapse. A cure may be found, but during a demographic collapse, the economy will collapse as well, and there is no reason to suspect that medical science will get the funding they need to continue the party. Returning to traditional morality, however, is free.
I think movie producer/director Judd Apatow was the only one brave enough to say "herpes is forever" in two of his films, "Forgetting Sarah Marshall" and "Get Him to the Greek." He was also brave enough, in "Knocked Up" to point out that sex leads to -- surprise! -- pregnancy, and the birth of a child. Imagine that.
Anyhow, he's the only example that comes to mind. Pathetic, isn't it? Everyone else portrays sex as this sterile, consequence-free recreational activity, and young audiences eat it up.