The hard-line government is backing away from a plan to relieve the sexual frustrations of young Iranians by promoting the Shi'ite tradition of temporary marriage, an official spokesman said Friday. Interior Minister Mostafa Pourmohammadi, a mid-ranking cleric, sparked an uproar last week when he told a clerical conference in the holy city of Qom that Iran should promote the obscure practice in order to meet the sexual desire of youths who are financially unable to marry.