18. 'The D.E.N.N.I.S. System' (Season 5, Episode 10)
Because he likes to think of himself as a helpful sociopath, Dennis occasionally tries to explain how he's so successful with the ladies, guiding his friends through his foolproof six-part process: Demonstrate value, Engage physically, Nurture dependence, Neglect emotionally, Inspire hope, then Separate entirely. But because Charlie, Mac, and Frank are who they are, each wildly misinterprets and misapplies the advice; soon, the gang ventures out into the real world with reckless confidence and are undone by their own idiocy. Meanwhile, Frank advocates for his own method of seduction: carrying around $100 bills and Magnum condoms, so that women will know he has money and "a monster dong."