Rarely, errors occur in the developmental process of sexual differentiation which result in diverse unusual sex and gender combinations. Some of these combinations include homosexuality, transsexuality, and transgenderism, as well as intersexuality. Now some people take issue with the use of words such as 'normal' and 'errors' when referring to things such as sexuality and gender issues. Normal' does not automatically imply 'better', or 'right'. Normal simply means a baseline norm, the overwhelming commonality.
Life is messy, and erros and exceptions occur.
Sometimes they are beneficial, and they confer an advantage, which is passed on. The advantage dominates. The very reason we are here at all, the basis of evolution itself. This is reality. It is not normal to be genderqueer.