Refers to either a horny guy's lack of abstinence-resolve
whenever he sees a pair of luscious coochie-lips, or a gal's similar inability to say no to "proceeding to
fourth base" due to her being totally "hot between her own legs",
as well.
If a guy is having trouble
getting a gal to spread her legs for him, there are various female-libido-boosting foods and herbs dat are
perfectly legal to possess and consume, and so he could try feeding some of them to her in hopes of getting her more "
revved up" and vulvnerable to his advances.