Nothing in relation to the presented weapons. Everybody has personal tastes and preferences. I have mine.
Personally, I cringe when I see such scabbards, especially kaskaras with the scabbards made from a whole croc. Will never buy a dagger with a deer foot for a handle. Even worse, I shudder when I see powder flasks made out of dried camel or other mammal (
) scrotum. Ascribe it to male solidarity or to Ziggy Freud.
NB: I am a dedicated carnivorous. But those examples revolt me. Never discussed it with a psychologist. Never had a psychologist. This is just my private quirk, and I am happy to live with it.