"Is a man who surgically or chemically castrates himself and believes himself to be a woman, actually a woman?"

Marco, please read both of these:

AI Overview

1. The frequency of natural human chimerism is unknown but may be as high as 10%, although very few cases have been recorded, with only about 100 documented in modern medical literature. This is because most chimeras are undiagnosed and may have no visible signs. Chimerism is more common in certain situations, such as a pregnant woman who, for a short time, may exchange cells with her fetus (microchimerism). In other contexts, like genetic sequencing, chimeras can form frequently during lab processes such as PCR.

Natural human chimerism

Frequency: Estimates suggest up to 10% of people may be natural chimeras, but most go undiagnosed.
Causes: Natural chimerism is formed when two fertilized eggs merge to form a single individual, or through cell exchange between a mother and fetus during pregnancy (microchimerism).
Detection: Many cases are only discovered accidentally through blood tests or organ transplants, as there are often no outward signs.

2. Hermaphrodites:

Intersex people are born with sex characteristics (such as sexual anatomy, reproductive organs, hormonal patterns and/or chromosomal patterns) that do not fit typical binary notions of male or female bodies. Experts estimate that up to 1.7 percent of the population are born with intersex traits.

We're finding out more as we go along, and it makes no sense to get repulsed because someone may have come from the merging of two different eggs, exchanged cells with mom, or some further thing that may be unknown now. Gays don't hurt us. Transsexuals don't hurt us. In fact if you can show they hurt us, I'd be interested, but not if it's contrived.