Final answer:
The word that best completes the sentence is 'sagacious' as it conveys the idea of seeking advice from older friends with wisdom and good judgment.
Step-by-step explanation:
The word that BEST completes the sentence is SAGACIOUS. Sagacious means having or showing keen mental discernment and good judgment. In this context, it means that the person needed advice from their older friends who had more experience and wisdom when it came to talking to girls. The word 'sagacious' accurately conveys the idea that the older friends had valuable insights and guidance to offer.
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