Can you be more specific about what you want to know? In a lot of ways, "virgin" is a cultural definition. For example, in some patriarchial societies, men really, really care if the woman has not slept with another man before them, and they place a very high premium on this. Yet they are not disturbed if the woman has used tampons, for example. That is having something put into her vagina, but as long as it is not a man's penis, that is OK.