Most people who argue that the Bible is anti-gay use the text in Romans

There's also the uncomfortable matter of Leviticus 20:13 (see Q7).

the disgusting orgies and acts of self-decadence [...] (which admittedly,. were pretty much as wrong as you get)

Hang on, are you saying that even consensual orgies are disgusting and/or wrong, or are you saying the Romans went in for nonconsensual orgies? How come self-decadence is sinful?

Peter