Hi Cat Mad,
My cat Olli was born without testicles, after investigation, His sexual organs didn't exist but he does have a penis so is classed as a male even though he has no male traits. as for his behaviour. Well I delivered him, he was brought up with me so is socialised with other animals humans etc, but he is very aloof even for a cat. very occasionally he comes to you for an ear rub but if you touch him when he doesn't want to he gets very upset and walks away. He very occasionally associates with my other cats but again only when he wants. He is happy but doesnt appear to have an emotional ability so he doesnt realise what he's missing in terms of cuddling loving etc. so with your cat I wouldn't know but dont be upset if she/him is never a lap cat. Just love him/her for what youve got.
she x