It's not even subconscious: it's lower-level than that. It's *neurological*. Sensory neurons habituate fast and stop firing much if a stimulus persists. (This is why you don't feel your clothing all the time.)

(Speaking as someone who, hygiene-wise, had entirely too many similarities to Cat Piss Man until four or five years ago, the largest effect of acquiring personal hygiene skills from my POV has been that I now notice all the *other* buggers who smell like the back end of a horse. I suppose people probably don't try to avoid me anymore, either, but I'm shy enough that this is a slight *disadvantage* from my perspective. Unfortunately I'm not enough of a bastard to say OK, let's stink again to drive them off... ;} )