Likely because it's just an incorrect statement, and vaguely accusatory. If you have a dataset of people that asks them if they identify as straight or gay, wit

Likely because it's just an incorrect statement, and vaguely accusatory. If you have a dataset of people that asks them if they identify as straight or gay, with no alternative, you're going to miss a lot of nuance, but you'll still likely have a useful dataset for extracting genetic effects. Most people would not describe their sexual orientation as fluid at all. You absolutely can crop off valleys and call it good science.