About a week after I bought him, I gently checked to see what sex he was. I'm confused because he has a round nest that he sleeps in and every day I pick him up in the nest and take him to a closed off area where we play. He runs and leaps and climbs on my lap and always eats from my hand. But when I try slowly to touch him he runs and if I pick him up he bites. I have no intentions of getting rid of him regardless.
Prey animals can easily become defensive when feeling threatened.
Their choices are basically fight or run, and when unable to run, they'll often bite if feeling threatened. It's easy to visualize if you imagine Elvis as the toy mouse in the previous letter. Maybe Bosco was imagining his toy mice to be struggling, biting him on the nose and then deciding to chose a more timid victim. Every time he bites you and you stop what you're doing, his acts of defensive aggression reinforce themselves. In situations like these, you need to gain his trust very slowly and gradually.