Originally Posted by martinguerre

1. Unnatural isn't a biological term.

2. Homosexuality exists in many different species.

3. If homosexuality is in any way genetic, it may be linked to traits that increase survival of near relatives. Extra adults in a group can help provide for and protect children.

4. Line? Why? Oral sex is pretty "unnatural" but i'd hate to be the one to tell the TFP that that was being outlawed.

it's a totally specious arguement...he's defining the terms to his liking, then setting up a false conclusion.