People can also choose for themselves within the constraints of their biological predilection. Society becoming tolerant then becomes subject to sexuality fads,

People can also choose for themselves within the constraints of their biological predilection. Society becoming tolerant then becomes subject to sexuality fads, and the percentage of people is identifying openly with sexuality of any stripe will fluctuate around a baseline. The percentage of people who are genetically, intrinsically, unchangeably bound to a particular identity will reveal itself over time so long as culture remains tolerant. To correct for fads and fashion, we'll probably need a few centuries. Absent sufficient data, confounding factors will make any assertions about external factors affecting sexuality impossible to falsify. We'll have reverse engineered the brain, and genetic influence on behavior and personality, long before we've collected enough data to empirically correlate sexuality accurately enough to validate hypotheses like "mold is making people hay."