>>11023997i’ve thought about this a lot, here’s my best explanation
stand in between an object and a mirror
look at the object, with your back towards the mirror
the object looks “normal”
now, face the mirror and look at the object using the mirror
you probably turned over your shoulder to do this
this is where the x-axis flip comes from
notice how you could have “looked in the mirror” by bending backwards and looking at the mirror “upside down”
in this case, the object would have appeared flipped on the y-axis
