Scented oils shouldn't be used around birds for the most part. They (oils) have medicinal impacts on humans and absorb into the blood-stream, not to mention the risk of inhalation...Essential oils can still be dangerous, and perfumes should be avoided around birds. Obviously a few seconds around a perfumed person will probably be okay, but you don't want your bird near that person for a long time, or touching that oil on your relative's skin..
Plus, some flowers/oils are toxic to birds---aside from the respiratory aspects--- like, tea-tree oil, for instance, is very dangerous for them.
I honestly ask my relatives not to wear perfume around my bird..lol...the close ones, anyway...