#handedness

Bottomless Pit - Left and Right

Little Dipper - Right

A Tale of Two Stans - Left and Right

CONCLUSION

Stan is both Left and Right Handed. He is Ambidextrous

[edit]

Here are my other findings

Ford Pines: Ambidextrous

Dipper Pines: Predominantly Right-Handed

Mabel Pines: Ambidextrous

So I tried to search for info on whether invertebrates show any evidence of bilateral symmetry variations (i.e. a preference for one side or the other) and my rabbit hole mostly contained lots of stuff on how invertebrate bilateral symmetry can be used to explain human bilateral symmetry. Which, sure, I get it, scientific articles are written by humans and we have a preference for our own.

But it seems like someone has got to have checked whether at least some kind of invertebrate has a preference for one set of feelers/antennae/legs over the other. Without all the studies that train ants or roaches to veer left or veer right, but let them go one of two ways and see if they prefer one over the other.

I write with my right hand, but I do mostly everything else with my left hand. I eat, open doors, brush my teeth, comb my hair, cut things, and basically do every other thing with my left hand. It makes a heck ton of things harder to do, but that's the way I've always done it. I can also write with my left hand, but not at a good speed. It is only slightly less neat than my handwriting with my right hand.