Biology actually has a lot of difficulty nailing down words like “species” as there are many useful ways to define a species in biology. Its not surprising that sexuality is a also a concept thats hard to pin down in biology. It is similarly highly useful in biology to define sexuality in multiple different ways - genetically, morphologically etc, but as a concept it doesn’t always fit perfectly and its an area where evolution likes to experiment, even in humans.
Would you care to elaborate on this, and preferrably add sources for your statements (or pm me) so I can read further?
It’s “meaningfulness” is secondary - it is most certainly a highly useful concept in the science and practice of biology and medicine.
Biology actually has a lot of difficulty nailing down words like “species” as there are many useful ways to define a species in biology. Its not surprising that sexuality is a also a concept thats hard to pin down in biology. It is similarly highly useful in biology to define sexuality in multiple different ways - genetically, morphologically etc, but as a concept it doesn’t always fit perfectly and its an area where evolution likes to experiment, even in humans.