When it comes to the issue of right and wrong, it's going to be
a tough debate.. Why? Because in this world there exists different
standards of moral acceptability caused by societal norms,
religions, and so on..
Premarital sex is, no doubt, a taboo in the past but whether we
agree or not, society has now moved in such a way that the
"taboo-ness" is decreasing. According to some, of course, sex is a
sacred process between the married couple, but snap back to
reality. Whats so sacred about it now in the society? You can still
stand strong and argue that it is still sacred and that's your view
to say but it won't probably change society's perception.
Simply lust? It could probably turn out one day that sex would be
perceived as nothing but just another form of exercise/activity.
But I'm guessing that as much as most societies are moving towards
that, it will unlikely to happen.
As mentioned by many others here, sex responsibly. The answer to
your question is not so clear here but it is a pre-determined
answer that they are for premarital sex.
My religion says no, and yet my society says yes (or at least it
looks like we are heading towards that answer). My say is not that
important after all..