From one of the May 2005 OLC memos by Steven Bradbury:
Nudity. This technique is used to cause psychological discomfort, particularly if a detainee, for cultural or other reasons, is especially modest … [I]nterrogators can exploit the detainee’s fear of being seen naked. In addition, female officers involved in the interrogation process may see the detainees naked; and for purposes of our analysis, we will assume that detainees subjected to nudity as an interrogation technique are aware that they may be seen naked by female.