During the apocalypse, besides fighting robots and learning their anatomy, you also spent your time learning how to draw them, just to make some blueprints for your stuff

So, having xbot as a companion, a robot who came to visit Earth and stayed since you were the last human and well, he was curious about you, you took advantage and decided to dedicate a notebook whole to him

It wasn't until you left it in plain sight that xbot got curious about how you wrote and all, but when he opened,his optics did too