The subtle art of dropping explicit pornographic playing cards in unsuspecting friends pockets or members of the public without there knowing.
For them later to find that what they was a there bank cards is in fact a hugely unsettling pornographic playing card. That usually creates a
funny fit of laughter or a slightly more *shit-forget I still had them* reaction. Instead of throwing it away the Cock-Carded
victim discretely puts it back in there
pocket to view later.