Virginity across Generations and Cultures
The definition of "virginty" varies across all cultures; Even within one culture the definition has mutated over time.
At one time, virginity was defined by whether a man/woman has married or has parented a child. Even today, in some African cultures, a marriage has not been finalized until consummation is proven by the birth of a [healthy] child.
In more recent times, conservative views have altered our culture's view of sex and virginity. That is, oral sex has come to be commonly defined as sex in the traditional sense of the word.
More accurately, virginity can be defined in many ways by what a person has not yet done (oral sex, anal sex, vaginal sex, etc.).