Why thumbs up and thumbs down buttons next to each other looks better when facing towards each other?

I'm designing a rating feature for an app with thumbs and thumbs down next to each other. i'm curious why is most examples i'd seen the hands will be facing each other instead of being in the same direction(right hands facing right). Somehow it feels more natural for them to be facing each other. is there any specific reason and logic behind this?

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