There's technically nothing great about being a virgin, but lots of people view it as a special thing.. and many of those people ended up losing it in circumstances they regret.. which may make them go 'oh, wish I was a virgin again.. can't believe I lost it to this douche bag'. As for the 'pure and virtuous thing', many people once again view it as a special thing.. and arguably a loss of virginity could be regarded as a major loss of innocence. If you're a skanky slut who sleeps around obviously you're not pure or virtuous, atleast in my opinion (I don't want to start an argument over this.. everyone acknowledge that I DID say imo).