I'm glad then that my botched explanation was at least somewhat useful. Haha.No I absolutely didn't understand how to tell the direction lol. Thank you!
Chirality is pretty freaky not just in the sense that some molecules are not digested (the point of artificial sweeteners), but because to our bodies they are "shapes" that can evade recognition or interact with random stuff. To give you the most common example, thalidomide has two enantiomers. One has sedative effects. The other produces severe malformations in limb development. And both forms are interconversible.
And now for the good of the thread I will shut up.