My husband has a theory that homosexuality may be caused by a virus
Absent, harsh, cold, distant, abusive, cruel, NONaffectionate fathers . . .
and/or smothering and/or absent, harsh, cold, distant, abusive, cruel mothers . . .
produce the most homosexuals . . .
Homosexual abuse of some significance at a critical age for that individual can easily result in such. Not implying that any such is not significant. However, not all such abuse results in homosexuality, by far.
Women who in the first trimester are carrying sons and who have a LOT of stress in their lives will have 20% above average numbers of homosexual sons, as a group.
Brothers who have a lot of older brothers have a higher incidence.
In one study, in 50% of the cases where one identical twin was homosexual, the other twin was homosexual. I don’t think the study was able to comment on environment vs genetics.