Yeah, it's a weird subject. When we think of torture we always image Rambo movies or something. But the Geneva Convention covers quite a bit of "little" stuff. Keeping in mind the differences in culture, what may be germane to us is quite an outrage to others, and vice versa.

The following is prohibited:

Article 3
1(a) Violence to life and person, in particular murder of all kinds, mutilation, cruel treatment and torture;

1(c) Outrages upon personal dignity, in particular, humiliating and degrading treatment;

Article 13
Prisoners of war must at all times be humanely treated. Any unlawful act or omission by the Detaining Power causing death or seriously endangering the health of a prisoner of war in its custody is prohibited, and will be regarded as a serious breach of the present Convention.

Likewise, prisoners of war must at all times be protected, particularly against acts of violence or intimidation and against insults and public curiosity.

Article 14
Prisoners of war are entitled in all circumstances to respect for their persons and their honour. Women shall be treated with all the regard due to their sex and shall in all cases benefit by treatment as favourable as that granted to men.

Article 17
No physical or mental torture, nor any other form of coercion, may be inflicted on prisoners of war to secure from them information of any kind whatever. Prisoners of war who refuse to answer may not be threatened, insulted, or exposed to any unpleasant or disadvantageous treatment of any kind.