Join Date: Jun 2013
Location: NYC, USA
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Same sex bonded couples do sometimes "mate", but I think what you're describing is when they preen each others "behind" feathers. My linnies do it all the time too, it's just a hard spot to reach and nice when they have a helping beak.
Bonding with a male human does NOT indicate that the birds is female. It is true that birds might prefer males or female humans, but that in no way related to the sex of the bird. the only way to tell the sex of the bird is through a dna test.
Even if they are the same sex, if they are getting along, why would you separate them? A bird provides another bird with the type of companionship that a human can never replicate, it's good if they are grooming each other. Even if they were mating, if you don't want chicks, you could always do something about the eggs.