In the decades leading up to the Flood, mankind deteriorated corrupting its values. They took for themselves unnatural mates. Robbery was pervasive. The divine solution was flood the world with water and begin anew. This was a one time occurrence and Hashem promised Noah never to flood the world again symbolized by the rainbow.
Why was destruction through water the appropriate response? G-d has many weapons in his arsenal, why choose flooding.
Why was man so intimidated by water that Noah was only prepared to rebuild the world after securing a treaty with G-d that never again would water destroy the entire planet?
On the third day of creation the Torah writes “let the water gather and the earth should be seen” meaning that originally water submerged the globe but by heavenly direction the water found its ways into valleys and trenches, forming lakes and oceans. Borders were now defined barring them entry.
When man overstepped his innate sense of propriety and willfully disregarded natural borders (by bestiality and homosexuality) the repercussion was releasing the restraints on the waters allowing them to flood the Earth. Noah was aware that civilization could descend and repeat its folly and was wary of rebuilding Earth. Hashem promised him never again would a flood wipe out the entire populated world.
Noah is considered base for beginning to rebuild the world by planting a vineyard. This is readily understandable. Wine leads to the loosening of moral inhibitions, after witnessing the havoc wreaked by permissiveness of his generation, wine should not have been at the top of his list.
The outside world attempts to flood our private lives, we must erect barriers controlling its influence on our lives.
When Noach planted his vineyard, the Satan asked if Noach would tend this vineyard in partnership with him. Noach agreed. Satan then brought a ewe and slaughtered it over the vine. He repeated the procedure with a lion, finishing with slaughtering a pig over the same vine. Man “in his cups” can be compared to these three animals, When he drinks one cup, he becomes humble and docile as a lamb. As he imbibes two cups man acts arrogant as a lion. With three or more drinks, he will be like a pig, rolling and rooting in his own filth.
If one can doubt that flossing will cause bleeding, one may floss on Shabbos .