Immutability

Immutability is the inability of a thing to be changed. For example, it is impossible to change a dog into a cat. Likewise, it is impossible to changes one's race or sex, although with makeup, drugs, plastic surgery etc. it is possible to conceal it or masquerade as a different race or sex.

There is some debate over whether a "sex-change" operation is valid.

There has been much debate over whether homosexuality is immutable. Often the argument is made that it's either genetically determined (and thus immutable), or that it is entirely a matter of choice. Given this dichotomy, the premise that "I didn't choose to be gay" yields the conclusion that it must be genetically determined. However, the search for a "gay gene" has proved elusive.

Simon LeVay wrote: "It's important to stress what I didn't find. I did not prove that homosexuality is genetic, or find a genetic cause for being gay. I didn't show that gay men are born that way, the most common mistake people make in interpreting my work. Nor did I locate a gay center in the brain. ... Since I look at adult brains, we don't know if the differences I found were there at birth or if they appeared later."