The debate on the issue of virginity has always
been in a stalemate. This is because our family, religion and
experience shaped our attitude towards this subject. Regardless of
the people saying NO or YES to pre-marital sex, allow me to post
you one question:
Can virginity, or the absense of it, substain a fulfilling,
promising marriage? 
To YES:
Lovers should not be open with their bodies just because they are
lovers. You are walking into the tombstone of love if sex
enters the relationship too quickly. They should only if
they are comfortable with each other, no obligation, mutually
emotionally stable and satisfied. (Simple words, but not that easy
to satisfy the requisites)
To NO:
Don't be mistaken, everyone has their rights to look for a virgin
bride and everyone is entitled their own decision regarding
pre-marital sex. However, is that SO IMPORTANT as a
consideration in marriage? What if your love isn't a
virgin? Are you contemplating to give her up? Or subconsciously
devalue her?
I have encounter cases where people devalue their partner because
they are non-virgin and usually, psychologically, it is their
hidden self. They may appear to swallow this harsh realilty, but it
choke right in the middle - producing invisible resentment and
devaluation. And it's just so sad to see the woman having to forgo
certain rights in her own relationship just because she seemed
'unpure'. The man don't treat her as well as before - even though they may not abuse
her.
Purity has nothing to do with a piece of membrane. Purity lies in
her heart and her personality and in the first place if that's
isn't what you are looking for - what's the difference between a man
going for external beauty and a man looking for a virgin wife for
ego-and-not-for-love purpose? I yet to see a man speaks
about his desire for a virgin wife in marriage, but truely doesn't
mind if his woman isn't one and WOULDN'T suffer any of the
symptoms above. Almost everyone belongs to either
side.
SibeiSuayKia listed down all factors within the
Ego purpose:
(I) The in-laws, (Even if you never involve in panky hanky before
marriage, it doesn't mean you will not after marriage and having
pre-marital sex doesn't mean that you will betray marriage in issue
relating to sex. This truely depends on the situation)
(II) The children (Parents engaging multiple partners before
marriage in the past? As long as the marriage is NOT involved in
this in any ways, why should the children be bothered?)
(III) The parents (Girls who engaged in sex before marriage
considered 'bad' girl? Again, not neccessary)
Basically, the way how society looks upon and think. (In fact,
coming from personal experience, I do notice that man who are
easily jealous/practice a little possessive trait/slightly
chauvinist, to be quite particular about virginity of his
wife.)
P.S: In love, the ego has to be scape for fulfillment to achieve.
Do you happen to know that SOMETIMES, things like these HAVE to
happen before one would learn anything in love? Of course, we all
have free will - a woman too easy with herself using her OWN
FREEWILL will eventually come to realise that she gain nothing from
the myrid of relationship she been through. But a majority of
non-virgins do not belong to that category. 
Cheers