I am trying to catch up with this continued discussion. I had a problem with my computer and missed an opportunity to comment about four pages ago.
I would just like to say (and I apologise if there has been appropriate discussion) that the biological purpose of sex is reproduction. However, for homo sapiens this is no longer appropriate. For homo sapiens the primary purpose of sex is the maintenance of the pair bond - and this is necessitated by the extremely long developmental period experienced by members of that species.
Human beings take about 12 years before they are able to reproduce. But this developmental milepost is reached before they have achieved full physical maturity and about 10 years before the human brain has fully developed. It is the time taken for the brain to fully develop which is the reason for the long childhood.
It is to the benefit of developing children that they have the protection of two parents. Sex is the reward that the couple receive for staying together. In most cases these are the the parents responsible for the infant's conception and birth. But it does not have to be so, children can be (and are) raised by people who with whom they have no genetic relationship. And children can be raised by two adoptive parents of the same sex. There is no requirement that only one member of the parenting couple should possess a penis or a vagina. The only requirement is that the relationship should be loving and supportive.
Q Four white, homosexual, American men went into a room together. What came out?
A West Side Story
PS
Another couple of points from a few pages ago.
I do not understand why Spud is so obsessed by the "Shalt nots" of the Mosaic commandments. Spud claims to be a Christian and the founder of his religion said that in his new testament there were only two commandments: (1) to love God, and (2) to love his neighbour as himself. If Spud's neighbour has a different sexual orientation from Spud that means that Spud is sinning if he treats his neighbour any differently than he treats himself. What other people choose to do with the contents of their underwear is nothing to do with Spud.
RCs, shame and guilt with respect to confession. I speak as a former RC. Shame is public, guilt is private. The confessional is private. No priest would ever shame a confessor, but (I believe) absolution is not automatic. A priest may tell someone that he cannot grant absolution unless that person makes some attempt to make good his sinful action. This may be handing ones self in to the police or returning stolen property or making good some other kind of wrong. But what catholicism is very good at is making people feel guilty. I walked away from religion over half a century ago - but if bearing guilt were an Olympic event then I would be in the medals.