Saying all this is very simple....I mean hypocrisy and all. Think what if the girl you're marrying already did it with somebody else. Same goes with men but nothing can be done here. Conducting these stupid tests won't help. Either Human Rights activists will jump in or Shiv Sena and other such parties will start burning dispensaries. It's people who either need to give up their ancient customs, change their mindset and accept things as they are, which seems almost impossible or youngsters should understand that having intercourse before marriage can be a risky matter. But then again s3x before marriage isn't a crime. So, nobody can be barred from it before or after marriage.
Conclusion: There's no solution to this problem