Old dudes get pickier as they age, says the latest "No-Shit" study. This one is from the Kinsey Institute for Research in Sex, Gender, and Reproduction at Indiana University and claims that as they age, men are more careful and particular about sexual partners. Other revelations: Sexually experienced women were considered more threatening by younger men, who had concerns about "measuring up," but such women were considered more arousing for older men. Plus! Just because a guy has an erection doesn't mean he's aroused; men in the study reported sometimes they have erections without even being interested in sex. (Yours truly knew a guy who would get boners on planes!) [UPI, EurekAlert]