A helpful Grammar post

http://litreactor.com/columns/20-common-grammar-mistakes-that-almost-everyone-gets-wrong

“Nor” expresses a negative condition. It literally means "and not." You’re obligated to use the “nor” form if your sentence expresses a negative and follows it with another negative condition. “Neither the men nor the women were drunk” is a correct sentence because “nor” expresses that the women held the same negative condition as the men. The old rule is that “nor” typically follows “neither,” and “or” follows “either.” However, if neither “either” nor “neither” is used in a sentence, you should use “nor” to express a second negative, as long as the second negative is a verb. If the second negative is a noun, adjective, or adverb, you would use “or,” because the initial negative transfers to all conditions. e.g., He won’t eat broccoli or asparagus. The negative condition expressing the first noun (broccoli) is also used for the second (asparagus).