Some nouns always require a possessor. This is sometimes called 'inalienable' possession. For example, in some languages, body parts such as <i>hand</i> cannot exist as <i>the hand</i>, like English, but must be <i>(someone)'s hand.</i>

<br><br><b>Reference</b><br>Bickel, Balthasar & Nichols, Johanna. 2008. Obligatory Possessive Inflection.
In Haspelmath et al. 2008, chapter 58.
Available online at <a href="http://wals.info/feature/58">http://wals.info/feature/58</a href>. 
Accessed on 2008-7-11.

