Born in '89. I suspect the reason millennials are less sexually active is less related to a disinterest in sex (or whatever the ridiculous claim about consent fears mentioned elsewhere in these comments) and more because of the same major issue that plagues most of my generation: money, or the lack thereof. This is also the primary reason that we're buying less cars, and going on fewer vacations, or whatever indicator of brokeassedness you prefer. We're broke as shit and in a ton of debt: http://slate.me/1udY1Ux. Spoiler alert: it's really hard to get laid when you're living with your parents and a night at Applebee's is a splurge. I'm lucky; I've got relatively little student debt and I write code for a living. I'm doing ok. But I've got lots of friends on or near the wrong side of 30 who are living with multiple roommates in crappy neighborhoods, and lots more who are back home with mom and dad. I've got friends with worthless law degrees from T3 law schools and $200k in debt who work retail. Almost everyone I know, except for some of the trust fund kids, has a frightening amount of student debt. Most have little hope for paying it off. Almost everyone I know came out of college into a labor market with little or no interest in them. Some of the STEM kids, the programmers and doctors and engineers, are going to be ok. Most of the rest are screwed. Somehow I suspect that's got a little more to do with sexual inactivity than any of the stupid ideas proffered in this link or the original study.