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[–]MarkTwainiac 6 insightful - 1 fun6 insightful - 0 fun7 insightful - 1 fun -  (0 children)

If sex is defined by gametes, doesn't that essentially mean sex is reproduction? Because gametes are for reproduction, and if sex is defined by gametes, then it follows sex is reproduction?

Yes, when speaking of all the plants and animals that reproduce sexually, sex does relate to and is based on reproduction - or rather, potential capacity for reproduction. In every sexually-reproducing species, there are two categories of organism - male and female - based on the kinds of gametes that early in gestation they develop the potential capacity to produce (or in some cases to mature and release) at some point later in life.

But no, it does NOT follow that "sex is reproduction." Sex classification - whether one is male or female - is based on whether one has developed the anatomy to produce, or to mature and release, either ova or sperm at some point later in life. Which is not the same as saying "sex = reproduction." Lots of individual members of various plant and animal species do not reproduce, but they still have a sex coz they can be classified as either male or female.

Again, your lack of understanding of biology and evolution in general keeps tripping you up and making it difficult to discuss this with you.

Every plant and animal species has evolved to reproduce itself to keep its own species in existence and evolving so that the species is best equipped to survive over the long arc of history. This is known as reproduction of the species or perpetuation of species. The instinct to perpetuate itself is built in to every species, and perpetuation of the species is every species' paramount drive. But that does not mean that every individual member of each species has the same drive to reproduce, or any drive to reproduce at all. Nor does it mean every individual member in any given species has the same exact capacity to reproduce or ends up reproducing. Homosexuality is a thing, as is a wide variety of forms of infertility - and these are factors that can affect quite a number of individuals within any species.