The horrifying, mutant breed of M&M's that have been transformed succeeding any time spent being held in a human hand.
Rick: Hey Jane, would you care for any M'M's? (Holding out an enclosed fist)
Jane: Why sure! That is so kind of you.
(As Rick starts to open his hand)
Jane: Wait a doggone second, do you expect me to eat those palm M&M's. Your half melted, color faded, shell cracked M&M's? Those slightly warmer than room temperature candies thanks to their recent close encounter with a human body? Shall I directly take them from you as they wantonly cling to your palm? Yeah, check yourself Rick.