I can relate...
It is uncertain whether my anosmia is congenital or traumatic -- apparently it's a relatively common consequence of forceps birth. I have suffered one nasal injury as a teenager which may have modified the condition, but I was clearly anosmic for years before that.
My experience of taste seems to be similar to D.S.'s, although not quite identical. And I also consume more milk than anyone I know, although I'd have to sustain nearly my peak consumption for a month straight to match his, and that never happens. I too can detect irritants like vinegar and smoke, although I cannot reliably distinguish them.
I'm not aware of having the total presence of mind that D.S. claims. If I have an odd behaviour that seems to relate to my anosmia, it's that when someone goes "Smell that! Isn't it nice?", I routinely find myself politely sniffing and agreeing with them even though I haven't actually registered any scent.