All humans, with the exceptions of a tiny minority with disorders of sexual development (DSDs) or Intersex, are either male or female. So there are two sexes.
We are not tilapia, frogs or molluscs, and these sexes are fixed for life. Sex can never be changed. The nonsense that biological sex has no basis in reality and can be changed from male to female is just that, nonsense. It derives from Post-Modernism; a rotten, toxic ideology. But that means we must explain the phenomenon of transsexualism, and to do that we’ll focus on the form found in Luzon in the Philippines, the bakla.
The explanation hinges on the critical difference between sex and gender. These are not the same.
Transwomen in the Philippines are classified locally as ‘gay’. The specific word used might be ‘bakla’, ‘beki’, ‘bayot’, ‘bading’ or any one of several others, depending on location and dialect.
Here, ‘gay’ does not mean what it does in the West. It means you are male but not a man; that you have ‘green blood’. You are an unmasculine male. In Luzon, the most popular local term is ‘bakla’. Their lifestyle is called ‘kabaklaan’.