I think saying sex is the same as gamete production is somewhat reductionist and not the usual definition either. And at a minimum that would create a 3rd sex, a body that did not produce gametes.
It’s very much the usual definition in biology. There’s no other definition that makes sense, because the animal kingdom is so varied. Sex is entirely defined by gamete size, and not producing gametes doesn’t confuse things. There is no body type that is organized around producing a third gamete size, or no gamete size.
XXX and XXY are variations within a sex. They still have bodies organized around producing either one of exactly two gamete sizes
I think saying sex is the same as gamete production is somewhat reductionist and not the usual definition either. And at a minimum that would create a 3rd sex, a body that did not produce gametes.
It’s very much the usual definition in biology. There’s no other definition that makes sense, because the animal kingdom is so varied. Sex is entirely defined by gamete size, and not producing gametes doesn’t confuse things. There is no body type that is organized around producing a third gamete size, or no gamete size.