What does Genesis chapter 9 verse 22 mean?

Genesis 9:22: "And Ham, the father of Canaan, saw the nakedness of his father, and told his two brethren without."

Whenever The Bible talks about a man 'knowing' or 'seeing the nakedness' of another man or woman, it is a euphemism for sex, in this case, the most despised act by Ham of raping his own father and then boasting to his brothers about it. This is confirmed when Noah awoke:

Genesis 9:24:"And Noah awoke from his wine, and knew what his younger son had done unto him. And he said, Cursed be Canaan; a servant of servants shall he be unto his brethren. And he said, Blessed be the LORD God of Shem; and Canaan shall be his servant."

This passage had such obvious political implications that we do not need to believe that it really happened. Noah cursed, not Ham but Ham's son Canaan, and said that Canaan would forever be the servant to his brethren. When this story was written down, the Canaanites, biblical descendants of the legendary Canaan, were the despised competitors of the Israelites. To say that the Canaanites were ordained to forever be the slaves of the Israelites, descendants of Shem, must have been very satisfying.