I wonder if this effect can be explained by the we form the "bouba"/"kiki" sounds when we speak them. "Kiki" has a sharper enunciation when using your tongue an

I wonder if this effect can be explained by the we form the "bouba"/"kiki" sounds when we speak them. "Kiki" has a sharper enunciation when using your tongue and mouth to form it, while "bouba" feels more like an open round one.