While not necessarily a determining factor of sexual orientation in North American or European cultures, tomboys, or TB (Hong Kong), Toms (Thailand), T (Taiwan) are a subgroup of the lesbian subcultures of many Asian nations. In these cases it is not an entirely lesbian identity, as the closest American equivalent, the butch identity, is. This identity is part social, part gender, and part sexual. Although these groups are not necessarily re-enforcing the male/female binary that comes under attack in many areas of queer studies, each group has a feminine counterpart: TBG (short for tomboy girl), Dee (short for lady), and Po (short for Lao Po) corresponding with TB, Tom, and T respectively.