I would say that's wrapped up in "makes me laugh." Aside from slapstick and puns requires thinking outside the box and making distant but (humorously) relevant connections. It also ties into "gets me" finding the same things funny.
I can think of a couple reasons of why perfect axial symmetry is mechanically advantageous.
I must also mention that we aren't perfectly symmetric anymore. The most obvious difference is the heart, but the brain is no longer functionally symmetric anymore, either.
this is a pet peeve of mine. I remember back around the time that the paper(s) were published establishing that facial symmetry played a big role in attractiveness. Before that time, nobody ever said, "oh, how attractive, look at that facial symmetry", because the point was that we are not consciously aware of what makes somebody attractive, it's our (metaphorical) lizard brain making those judgements, like the way we can generally tell M/F for people very far away. (and to add on, before this it was a quite popular "psychology experiment" to show two pictures of people, their left and mirrored left, and their right and mirrored right, to demonstrate that our faces are not symetric. One usually looked like a brooding criminal, and the other a beatific calm)
so, announcing whether you find somebody attractive or not is a far more authentic piece of information than your judgement of how symmetric their face is. Symmetry is far from the only input, and it's not conscious, it's only part of the wiring of the brain.
It is interesting to learn that the brain has wiring for unconscious symmetry measurement.
Now, I do wonder if, developmentally, the conditions that allow facial symmetry to develop somehow also allow higher IQ wiring to develop, or something hand wavey like that.