Cage aggression is very much fact hardly possible for a ball python though that is what control studies say. My BP is very social I will get him out and he'll wrap around my neck for hours can pet him on the head he doesn't flinch but I hatched him and give much attention to my snakes, you can handle quite a bit just increase handling gradually and don't just yank them from their hide. When basking is best as they are likely awake aware and won't be surprised by your hand and one they feel your warmth and relay they will grow more and more trusting of you.
reptifnatic