Send him an anonymous deodorant sample by mail..
They always send samples out through the mail, so it won't hurt his feelings (Insha'Allah)
or you can just give his address to one of these free promo sites, so they can do it directly
http://freebies.about.com/od/beautyf.../p/ossfsfm.htm
where it will look even less and less suspicious...
and Allah knows best

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