This is short, but probably the most succinct explanation of why women's advice is only useful to guys who don't need it:

http://theprivateman.wordpress.com/2011/02/21/mom-was-wrong-a-personal-narrative/#comment-102

If you ask a woman about ATTRACTION then she will have absolutely NO CLUE what you even mean!

Women ASSUME attraction in any discussion of relationships. After all, from their point of view, unattractive men are just a nuisance. Only men they already find attractive merit their attention or consideration at all!

So they automatically misinterpret any male question that involves attraction. They think it means “how would I like a man to treat me when I am ALREADY attracted to him?”