This very interesting, I was wondering myself. Igbo seem to prefer my son over me. Doesn't hiss at him, is relaxed with him, seem to be very curious about him, smells him and looks at his face, and keeps a firm grip on his hand while exploring. He squirms away from me, and hisses at me if I try to open his enclosurer, if I am holding him he tries to go back to my son. My son just started taking over his care, and only started handling him once Igbo was on the mend. He may associate me with his stress of moving, mucking up his cage(setting it up),etc. I also wonder if it is my scent, I am constantly cuddling with my dog, and while I wash my hands and arms well before holding him I am sure I smell like the dog. Of course my son is greatly amused by all this, he is 12 and agrees with Igbo that I am an ogre.