My point on the other issue is -- they are not born that way. It is not biology. It is not science. It is not equal to heterosexuality. No one is physically made to have intercourse with a same sex partner. No part of their biological make up supports that theory. Desire doesn't make it natural.
What, exactly, are you basing your theory on? If male nipples make no sense to you, then why does anything else have to? Why do humans have hair on our arms and legs? Why do men tend to have hair on their chests and frequently go bald while women tend towards neither?
Nature isn't dictated by what makes sense.