Eh, I was a bit off
The Sexy, Healthy Scent of a Man | LiveScience
In 1996, Claus Wedekind, a zoologist at Bern University in Switzerland, conducted what's become known as the stinky T-shirt study. Wedekind had 44 men each wear a t-shirt for two nights straight, then tested how women reacted to the smelly shirts.
Like mice, women preferred the scent of men whose immune systems were unlike their own. If a man's immune system was similar, a woman tended to describe his T-shirt as smelling like her father or brother.
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