While it may become used to your presence, there is no way to train a tarantula. They can be docile, but a nervous or frightened tarantula can and will bite. Their bite has been compared to a bee sting. They can also raise their hairs which have barbed tips and can be irritating to skin. Best to handle a tarantula as little as possible or not at all unless you are really experienced with arachnids and even then you can be bitten.