My wife said her last fellow had lots of pheremone scents, and they smelt disgusting. Could be negative association though. I don't know first hand, but I've got a feeling that it's bollocks. I've heard though that there are pheremones in leather that women respond to, so wearing a leather jacket could have the effect you're looking for. There's always been an association between men wearing leather jackets and a cool/tough type image, so maybe there's something in that.