No one chooses to be gay.
Repeat HOMOSEXUALITY is a BEHAVIOR. The behavior is sticking a penis into a crap filled rectum. (pardon my French)
BEHAVIOUIRS are COMPLEX, meaning there is not just one cause and/or multiple things come together to cause the behavior.
Stealing,lying, drug use, etc are behaviors.
Some behaviors are not good for society and individuals.
ALL behaviors can be modified.
A man told his doctor that he identified as a woman and wanted sex reassignment surgery
The doctor told him he knew a meat butcher who identified as a surgeon and advised he would be happy to make the referral