Noach is now starting a new world with wine (Simcha). The old world was destroyed because of Gezel and Arayos, and the only way to conquer the Yetzer Hara of Arayos is with Simchas HaTorah. (Gemara). The Rambam brings this, and he brings a Passuk that describes the love a person should have for Torah: בְאַהֲבָּתָּהּ תִשְ גֶה תָּמִיד משלי ה יט “be constantly involved in the love of Torah”. תִשְ גֶה means: שִ גָּיוֹן Meshuga, which means becoming Shikor (drunk) and crazy over learning Torah!
Chazal say that Noach learned Torah. This is how he was able to overcome the Yetzer Hara of Arayos. The last K’riyas HaTorah on Yom Kippur is about the danger of Arayos. The Rambam and the Mishna both begin discussing Simchas Bais HaSho'eva by mentioning that they made a Mechitza between men and women. Why? Doesn’t that belong in: הִ לְ כוֹת אִ יסוּרֵ י בִ יאָּ ה the Halachos of forbidden relationships?
