Offered on eBay:

ThoughtVertising - A Global Advertising First

For the first time in advertising history, brand owners are offered the opportunity to buy media space within someone's mind.

"How?" I will think of your brand every hour, on the hour, for a period of a week.

That's all, he thinks about a brand hourly, and submits a report after a week of "sponsoring brainwaves." A joke? Maybe, but the serious winning bid was $10,000. [And I'm helping make it worth that.] See more. Via Media Blog.

Brad of Milligram wrote about a psychiatrist from olden days who claimed he could diagnose patients by their smell alone, and expressed scepticism (wouldn't you?), but there actually is some science behind it.

Identification of schizophrenic patients by examination of body odor using gas chromatography-mass spectrometry and a cross-selective gas sensor array, Di Natale et al., 2005 (free PDF) has the scoop on the "richer" and "peculiar" scent. They concluded that there is no one variable, but a "global variant" of body odor.

I imagine that a practising psychiatrist with a good nose just might be able to sniff out a diagnosis, at least a first impression.