And one last thing for Aineo...
If dysfuctional / negative / no relationship with the father was enough to cause homosexuality... we wouldn't be the minority.
It's all very well and good to do a bunch of case studies, and find that a lot of gay people have problems with their fathers. But unless you proceed to a broader study that includes heterosexuals as well, you can't necessarily assume that it means anything. A lot of people have problems with their fathers.
The study could be pretty simple: Compare people who grew up in a two-parent household to people raised by single mothers. "No relationship" is much more quantifiable than "dysfunctional," and it eliminates any question of whether the problems could have increased if/when the father reacted badly to the child's homosexuality, thus skewing their judgement of him. So you take those two groups, and you see if the ratio of gay people varies. That would mean something.
Has anyone done anything like that?