Phantom smells?

Both my twin sister and I will randomly smell my dad’s cologne when he’s not around. We never smell it at the same time but we both know what each other are talking about. The smell is never ACTUALLY there but it is a nice scent. It used to happen a lot when we were younger but not as often anymore. I recently heard about phantom smells and how they can be signs of something concerning but usually it’s more of a metallic or chemical scent. Is this something I should get checked out?

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