Emeraude is pretty potent -- I get a headache from it at 100 yards! Used to love it, though. I thought it smelled like a margarita tastes.
I get a headache from anything with too much musk in it. Years ago, 60s/70s, women wore a lot of musk. I had asthma all the time, it seemed, until the musk went out of fashion.
And yes, I think some old ladies are wearing perfume they bought 20 or 40 years ago. Real essential oils don't spoil, but some of that synthetic stuff seems to degrade over time. Or else they just had appalling taste in perfume back then. I don't really believe that, though.