Two Finger Testing is a method of Virginity Testing in Women,  which  involves testing for laxity of vaginal muscles with fingers. It is usually performed by a doctor who inserts a finger into the female’s vagina to check the level of vaginal laxity. A high vaginal laxity and the absence of a hymen usually means that the Female had Sexual Intercourse in Past.
However, Virginity testing is not a reliable indicator of a female having actually engaged in sexual intercourse because the tearing of the hymen may have been the result of an involuntary sex act, such as rape, or other event. Many researchers note that the presence of an intact hymen is not a reliable indicator of whether a female has been vaginally penetrated.
The hymen, named for Hymen, the Greek god of marriage, is a ring of fleshy tissue that sits just inside the vaginal opening. Normal variations include everything from thin and stretchy to thick and somewhat rigid; it may also be completely absent. Whichever allows for the passage of menstrual fluid; the only variation that may require medical intervention is the imperforate hymen, which either completely prevents the passage of menstrual fluid or slows it significantly. In either case, surgical intervention may be needed to allow menstrual fluid to pass or intercourse to take place at all. It is a misconception that the hymen always tears during first intercourse or that intercourse is required to rupture the hymen. In 2009, the Swedish Association for Sexuality Education proposed that the term “hymen” be changed to “vaginal corona.”
It is commonly accepted that some women are born without hymens. A female can also undergo a surgical procedure, hymenorrhaphy or hymenoplasty, to repair or replace a torn hymen, to pass a virginity test.