SSJ Plumber Curvin on Nostr: Ok since you lot like to get psyopped into getting a new fetish virtually every ...

Ok since you lot like to get psyopped into getting a new fetish virtually every weekend, help me understand this behaviour that is seen uncommonly in anime, and much more rarely in real life:
>Smelling
I tried explaining this to myself, why do some people try get close enough to catch another person's scent, or more commonly, trying to get their smell trough sniffing their used clothes, shirts, underwear, that.
Is it some type of perversion? A sub-concious sensual thing? Or just a "lovey dovey" act?