日本語 Japanese Ask Questions Thread 8

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英語でも日本語でもOK
日本の方からのご協力も大歓迎です

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I cannot quite understand the humor in this dialogue, specifically what exactly is eros "エロス" in 鰯 and 鰆 kanji, if I'm understanding correctly about 鮑, it's something like this - http://detail.chiebukuro.yahoo.co.jp/qa/question_detail/q1475142684
Maybe I'm understanding something incorrect, so and I would really appreciate if you help me with it.

高峰：「どうした？」
筧:「いや、「鰯」ッて感じには、なんかこう匂い立つエロスがあるなって思って」
適当に言い逃れをする
高峰：「そこに気づくとは、お前も通だな」
高峰：「俺としちゃ、魚偏だと「鰆」を押すね」
筧:「「鮑」かと思ったよ」
高峰：「ガキじゃあるまいし、そんな直球投げるか