This may sound a bit uncultured but yes sex is a matter of personal preference... once it is commercially done that's where it is called prostitution...
The irony here is that we are neither fully modern nor fully Orthodox. We talk about culture but we should not forget the practicality of today's world.... we may like or not but world is changing n same is applicable to every single situation. for an eg.. 10 yrs back did you had the freedom to talk or discuss about sex so openly? or Sex education/ condom commercials but now you have the freedom of talking about every taboo, for some this also may be violation of culture. Culture has a very vast definition... and every one of us have different set of rules for our culture For eg. some may think wearing a saree was our culture but now a days very few young women wear it in office because practically its tough.... Yesteryears women dint used to manage house n office at one go nor did they used to run to travel to their offices for 35 km in local trains or in packed buses so are we offending our culture ? no we are being practical with it...
now lets talk about sex... our culture says premarital sex is bad, earlier no couple lived together before marriage its a sin but if you think the other way, circumstances have changed.... earlier people used to get married early so their physical need were fulfilled as soon as they get adult where in now a days late marriages are common also earlier teens did not had the privilege to easily know everything about sex on internet or books etc but now a days a young kid knows how & why a baby is born so Sex is no more a taboo for youths now. Earlier girls n boys (specially girls) were not allowed to leave their family n live in another cities for job so they always lived with families but now every other youth is living out of their home city so their is no restriction at all n they form a kind of small temporary family for them self. I have known few couple who lived in together before marriage n have seen that its not just sex which bring them together its also loneliness, lack of family's emotional support and in some cases financial support also. Now you may say then why don't they get married if they need these things so badly? the answer is because they are extreemly ambitious now... they want money, status, position, love, family, lifestyle... everything n decide accordingly in which order these things comes in their preference list.
As far as virginity is concerned even if we make a rule against pre marital sex we really cant stop it because sex is a matter of high privacy n one cant prove himself innocent of guilty (until medical checkup). Saying all this doesn't mean that I support pre marital sex or one night stand or live in relations but what I want to say here is we really cant do anything until unless we strongly believe that the only thing which could prevent it is actually our inner self & up to an extent our society.....Not our legal system. Mr Rao is correct that how many of us will be ready for personal oath but don't you think for those who are not ready for personal oath will do it anyways even if we make a rule against it... though giving God's example is not good according tme because we are in no way comparable to GOD