This special tag was introduced by one of our members. The 'tongue' is located at the very bottom of the vagina opening (near the anus hole) and this pink part has a shape of a triangle or a tongue (hence the name). It's probably a residue of the hymen. The shape of this 'tongue' differs from woman to woman and its appearance is rare (about 10% of women). Even when it exists its visibility depends on the pose, lighting, angle or width of gaping.