I wonder what percentage of LGBT... folks would be pissed off
if it were scientifically proven beyond a shred of doubt that, in their particular individual case, chemical pollutants(or something along those lines) caused their 'preferences'.
Not looking at this morally but in the same way that if some aspect of anyone's life that puts them outside the norm in an arguably negative way could be definitively traced back to something like exposure to certain chemicals in the womb or as a child.