Yes let us get technical:
1. Meaning of the word consort = a husband or wife especially of a monarch.
An anthropomorphic God form is itself the result of Man's inability to find anything better than an anthropomorphous form. He just does not know anything better than that form in the world, on the earth where he lives. And female bhakta with all the beauty, intelligence, grace, boldness and the most important motherly nature is represented as a female anthropomorphous entity. There need not be anyother special reason for that. Moreover at the philosophical and anthropological level there is a need to include female form at the highest level as otherwise it will become a subject of unnecessary and never ending speculation about the form itself. In vaishnavite philosophy, a consort is always a mother who understands the bhakta better and so pleads his/her case with God. (purushakAra).
So the JivAtma in that body of the girl when it attained sAyujyam has been aptly called a nAtchiyar meaning the consort. She was a bhakta before sAyujyam and became a consort after sAyujyam for the ardent bhaktas.
2. A male bhakta also becomes one with God after sAyujyam. Thus you will find the various Alwars who are worshipped as the different aspects of God. One Alwar is the Koustubam that is worn by God and another is the wart on God. Try to read the phillosophical background of religions before applying our inadequate scales of knowledge to measure or question them.
3. Alwars are also worshipped as aspects of God. Please refer to point 2 above.
4. Please read 2 above. I resent the imagery used.
5. Yes. We humans are trying to make the task of dealing with God entity easy by giving it a form, name, qualities/aspects etc., with only those materials we are familiar with. You call it "orientation". There is nothing creative or there is no sAyujyam in a homosexual pairing and that is perhaps the reason why we have consorts that are only female forms (more details can not be discussed here in the forum about this for obvious reasons). A century hence the picture may get changed. LOL