Who will remain sexually active longer, men who self-identify as conservative or men who self identify as liberal? What would you guess? Well, the very long-term study of men at Harvard and the control group of men of the same age, (19 at the start of the study in 1938), from Boston inner city neighborhoods came up with statistics on this and many other elements. According to the study, the most conservative men ceased sexual relations at an average age of 68. The most liberal men continued to have active sex lives into their 80s.