WRT humans, ‘abnormal situations’ are rife, these days.
There have been a couple of studies which have suggested that exposure to synthetics - like DES - appear to have caused a statistically significant rise in, at least, female bisexuality/homosexuality. Enough to have warranted further study.
And we’ve been exposed to MANY weird, unnatural substances in recent decades - not to mention poor parenting and dysfunctional families (which have been with us forever.)
I think there’s a lot more going on when it comes to homosexuality than simple, perverse will on the part of the person who ‘swings’ that way.
I can see why many people may think that they were ‘born this way’.
Read a good book some years back by a guy who had spent decades counseling homosexuals as a psychiatrist. He said the first few years of life had a huge part in encouraging people to seek love from the wrong sex, to the point where some found it very hard to change even when they wanted to do so. He said it wasn’t genetic but in some cases it was a very difficult behavior pattern to change.
I have enormous sympathy for someone struggling with homosexual impulses. Very little for someone who claims it is admirable and needs to be applauded.