Why in Asia, why are the untouchables called untouchables? A hygiene thing.
Typically speaking, the more beautiful someone is, the more hygienic they are. Ugliness is typically a mental shortcut for us to think that another person is not hygienic and potentially a carrier of disease.
Even now, I discriminate, whether I think somebody might have Covid, or might be an anti-VAXxer. Also how I am very very discriminating on who I decide to let touch my kid.
Touch is the ultimate human privilege.