I've heard that is one of the reasons pirates wore eye patches (via Mythbusters..great show). So that when they went below deck they could remove the eye patch and have a good eye for seeing in the dark. Similar to the experience you had. Abusive comment hidden. (Show it anyway.)
Same stuff here in Korea. The Koreans don't like the icky-sweet double-stuffs either. I think they're plenty sweet, but I've been in Asia for awhile. Abusive comment hidden. (Show it anyway.)