Few topics are as fascinating as homosexuality. The origin of homosexuality is perhaps the most interesting aspect of homosexuality. Given the prominence of homosexual issues, it is high time this issue were resolved.

Some biological correlates of homosexuality can be dismissed with little difficulty but others are hard to explain away. Some specific family environments and childhood experiences have been reported as more common among homosexuals than heterosexuals. Homosexual behaviors or interests tend to be unstable in some individuals and this has been interpreted as suggesting that...