Whole wheat bread doesn't show greasy fingerprints as bad as white.
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I had a friend many years ago that was a mechanic and not a very neat one.  At lunch he would not wash his black grease covered hands.  When he ate his hamburger at lunch he would carefully hold it by the smallest corner and eat all but that little corner and then throw away the black stained bit of burger and bun. <I>- guru</I>