None of us heterosexuals consciously decided which sex we would fall in love with or what body parts would sexually turn us on. It just happened. There is some research that suggests homosexuals are born with a slightly different brain. The significance of this is not known yet. It is known that many gays and lesbians believe they were born that way.
Some people convert to homosexuality as adults, sometimes after having children.
In spite of these conversions, therapists believe that sexual orientation is hard to change, especially in males. Females seem more likely than men to change to homosexuality later, even in their thirties or forties. Therapists usually believe it is more realistic to help someone adjust to the serious social difficulties of being homosexual than to help the patient actually become heterosexual. People, especially adults, loving each other and harmlessly having consensual sex are hardly major worries compared to people hating and being mean to each other, such as being prejudice or going to war. Gay parents seem to produce straight children.