I've been using a CPAP for sleep apnea going on 10 years now. My wife just got diagnosed with sleep apnea about a month ago. She's been having difficulties finding a mask that works for her. I showed her a couple of styles of masks that I wasn't using. She pick out one and asked me if I'd ever used it. I told her honestly that I didn't know. She took one sniff at it and she declared that I had used it; she could tell by the smell.
Oh, oh. She can smell me on something I hadn't touched for almost 10 years. I guess I should be wery, wery careful.