More importantly marriage is a social contract between adults which is recognized by the state. We can describe male or female characteristics both physically and mentally. I know masculine women who are flat chested, have short hair, and exhibit virtually no common feminine characteristics. I know men who are so effeminate, if I was blind I would guess that they were female. Physically some percentage of people have characteristics of both male and female genitals.
Sex is a genotype.
It is a configuration of genes which determines, in most cases, how a person is to develop sexually. The expression of a genotype is called a phenotype. Jamie Curtis, a famous actress could be considered genetically male. Rather than having two X chromosomes like women, she has X and Y chromosomes like men do. In an effort to appease the fears of those Californians who fear that marriage is under attack by those pairs of people who are not genetically equipped to enter into a proper marriage I propose a proposition in which we reconfigure the wording of the marriage vows to be scientifically accurate.