Hey Dan, everyone. On the subject of theological debate, I wondered if you'd seen this:
How to justify pretty much anything via the Bible, including threesomes (not MMF threesomes though, as "Although two men having simultaneous sexual relations with one woman may not have any overt homosexual contact between them, the act of sharing a woman and being together in a sexual situation is nevertheless homoerotic and suggests implied homosexuality, as well as presenting a temptation to experiment where one may ordinarily not. For this reason, we feel it is best for a couple to avoid bringing another man into the picture.")
It's really quite... errr... enlightening...