Some people find it difficult to communicate their needs because they are simply uncomfortable having any. Others view "not needing" as some sort of strength and get a self-esteem 'boost' by acting as though they need nothing. Some define "not needing" as "strength," while viewing having needs (or, as some refer to it, 'being needy') as a weakness. Other people may just not be terribly articulate when it comes to expressing their needs.
Some people prefer not having to express their needs directly believing that others; certainly their partners, ought to be able to figure out what they need without being told directly. This is viewed by some as an indicator of caring, while not understanding another person’s needs may be seen as a sign of not caring.