I am pro. The way I see it, the Biblical Saints did an admirable job of trying to guage God's feeling on this. Unfortuantely, technology wasn't around back them for them to understand that homosexuality was neither by choice nor something unchangeable (as the American Psychological Association tells us). Just as back then they said schizophrenia was due to demons because, until the mid 1960's or so, no one knew about the neurotransmitter Dopamine and how too much of it causes schizophrenia.
The Biblical authors did the best they could, they were just wrong.
One hears this a lot, but I guess people just don't think about how very unlikely it is. I seem to recall this argument being made in the EFM course, which makes me wonder if they botherd to actually check with anyone who could comment on the ancient and medieval understanding of sin.
But put it this way. Saying that they thought homosexuality was just a free choice with no relation to the body or biology means you would have to believe a number of other things that are pretty silly.
1. The people that believe this mustnever have actually felt attracted to someone of the same sex themselves. If they had they would realize that attraction was not a "choice".
2. They must have never met anyone else who had, or not believed them.
3. They likely had never been attracted to anyone else inappropriate, allowing them to compare same sex attraction to other kinds of inappropriate attraction.
4. They must not have ever suffered from other sinful tendencies that have their origin in the body, which would allow them to extrapolate the principle to same sex attraction. Anger for example, or gluttony.
The Early Church understood quite well that many predilections to certian behavior had their origin in some way in the body. The exact mechanism is and was irrelavent - they knew people feel violent anger, lust of all kinds, jjelosy and envy, etc, not normally because they choose to, but because these feelings somehow arise, undesired, from the body or the mind. In some cases these feelings are simply misdirected, in other cases misordered, and in many cases we fail in our attempts to control them. The Church has always seen this as a result of the Fall.
Choosing to persue these things has been what is percieved as a sin for the individual, and the amount of sin involved is mitigated by our human inability to totally control ourselves in many cases. The feelings themselves and our lack of complete control were not seen as a sin by the individual, but were understood to be a result of original sin.
I'm not sure why anyone ever thought it is plausible that the people of the Early Church, medieval period, or whatever, had a totally different experience of being human than we do.