If the beautiful blonde isn't going to 'lend a hand' when her boyfriend is furiously jerking off in the bathroom, then at least she could try knocking on the door before she barges in on his skin solo. That's the sage, down-home advice from her curly-haired compatriot on the Try Knocking Birthday Humor Card. Over cake, pie and coffee, the colorful ladies discuss and resolve the self-pleasuring boyfriend dilemma. You can resolve the birthday card dilemma, by delivering that special someone furiously celebrating a birthday this clever, sexy, bright-yellow-on-the-inside card. Make sure you or the postman knocks first, however.