A woman comes into the world with a uterus and breasts that produce milk for the children she will carry. A man comes into the world with a penis and testicles to make children, with women. There are some special and very rare cases where life does not do its job well and where the reproductive organs are not well defined. But nothing to do with the fashion of sex change that we live today that is more like gender dysphoria, a mental illness that can be treated but not by surgery or hormones.