Yay is, in many ways, somewhat akin to a child. You must remember this when considering their actions and their motivation.
They have not had a lifetime of practicing social and emotional skills. Which we all do, and still fuck it up all the time. They have had a lifetime of hiding, isolation, and learning from *outside observation*. which can only take you so far.
Yay is alien in many ways to our experience, but also? They are an Earthling. They are of us and our world and environments as much as they aren't. and almost all Earthlings of a certain complexity crave at least a bit of acceptance, companionship, at least a tiny bit of understanding. Haven't you seen the most hostile and un-human animals show affection in the ways of their kinds? Even if only a little? the internet is full of such videos.
and anyway, the fact that Yay can interact to this degree with other beings on this level of sentience goes to show perfectly well that, whatever Yay might be also, they are also this. And so they need, as we all do.