We can distinguish a shemale from a sister by her appearance, because Thai shemale can have sex-change surgery or take estrogen drugs to change her sex. The most obvious way to distinguish a shemale from a sister is to look at their Adam's apple, because women don't have an Adam's apple, but men will have their own Adam's apple when they have sex-change surgery, so we can see if a shemale has an Adam's apple when we distinguish between a shemale and a sister.
Second, the living environment
When we travel to Thailand, we can see many transvestites, but these transvestites are not like this at first. They also have their own lives, but they feel that their lives are very unsatisfactory, so they go for sex change and take some estrogen drugs to make themselves look like special women, so that they can earn more money for their lives and live better.
Third, the era of shemale.
All the transvestites we see are particularly beautiful and sexy. People think that transvestites have a good life, but in fact they are particularly miserable, because transvestites themselves are only forty or fifty years old, because they need estrogen to maintain women's bodies. In fact, this method is particularly harmful to the body, thus reducing the life span of transvestites, so many transvestites can't live past forty or fifty years old.
With the rise of tourism, some Chinese tourists go to Thailand just to see Thai shemale, whose sexy attraction deeply attracts some male tourists. As long as we understand the life of the shemale, we will have some sympathy for the shemale, because they also live for themselves, so we make ourselves like this.