If you belong to a mens group, you may not be surprised by the results of a survey of 1,500 men at the Promise Keepers gatherings last summer. Fifty-one percent of the sample reported a struggle with masturbation, and 51 percent also fantasize about having sex with women other than their wives. Seventy-four percent reported that their sexual thoughts concern them. Fifteen percent reported they were sexually unfaithful to their spouse. About 33 percent reported enjoyment in looking regularly at sexually oriented material, including videos and magazines.