I guess the "sexually repressed" comment does seem to fit the criteria well. In my hall the "perv" was a middle aged man who was married to one who was overweight and not prone to much conversation. When he went on his first vacation in years and asked me to take care of the congregations donations while he was gone, he gave me his briefcase which also contained copious notes on various judicial cases in our hall. Just reading some of them made me have to take a cold shower.