LOL. Cats are strange too sometimes! We have three, and one is a male. HIS own brother went to a neighbour but sometimes comes back for cuddles and to steal food. Ours was always OK with it, and now, all of a sudden, he hates him and they have a screaming/crying/staring contest. And the ladies? They just look at them as if to say: 'Whatever...' and come inside for their sleepy hour.