You are no longer a virgin when there is intromisson, that is penis is inserted into the vagina. Until then you are a virgin.

No, it does not. Oral sex isn't sex, despite what people may try and tell you. Now I'm not saying it isn't a big deal, or that it is something you should do with just anyone, but it isn't sex. When you have sex, you are no longer a virgin.

1) "A virgin is most commonly seen as a person who has not engaged in sexual intercourse. In a stricter sense it is somebody who has not yet engaged in sexual activities (the wider this term is taken, the stricter the definition of virgin). The status of "virginity" (remaining a virgin) is something that is respected and valued in certain smaller segments of society, especially in regards to religious views of retaining one's virginity before marriage." "Some historians and anthropologists note that many societies, such as the United States before the sexual revolution that place a high value on virginity before marriage, actually have a large amount of premarital sexual activity that does not involve penetration, e.g., oral sex and mutual masturbation. This has been termed technical virginity or hot virginity." Source and further information: http://www.nationmaster.com/encyclopedia/Technical-virginity 2) "The notion of technical virginity is widely derided by many social commentators. In fact, the traditional theological definition of "virginity" in the Catholic tradition is the absence of any deliberately felt sexual pleasure. Assertions of technical virginity, often made for religious reasons, may be regarded by some as grossly hypocritical and self-delusional. The well known advice columnist Dan Savage frequently ridicules such assertions when made by correspondents to his column and podcast Savage Love. His view, shared by many, is that "having Sex", explicitly includes sexual activity other than vaginal intercourse, including oral or anal sex, or mutual masturbation. It therefore follows that once an individual has engaged in such sexual activity, they are no longer a virgin in any meaningful sense. Still, many people would admit a somewhat important difference between those acts that merely give sexual pleasure (i.e, performing oral sex, a handjob, etc) and those that receive it (penetrating, being penetrated, or otherwise brought to orgasm). Though there might be the notion that the recipient of a handjob has lost their virginity, few people would consider the hand that performed it to be therefore deflowered. There are however anthropological reasons to the view that vaginal penetration, especially on the part of the woman, as especially indicative of a change in status, a threshold irrevocably crossed, the most incontrovertible "loss of virginity". And that is because a woman who has been vaginally penetrated is one who may have potentially conceived. From an evolutionary standpoint, men would prefer "virgin" mates under this definition to be sure that the woman was not carrying another man's child which the new husband would be "tricked" into caring for as his own. Neither the fact that no conception took place, nor the use of contraception, nor the passing of more than a full gestation period can remove this sociological stigma in many societies, as it is biologically, not rationally, based " Source and further information: http://www.shvoong.com/social-sciences/1763673-technical-virginity/