Generations: The Real Differences Between Gen Z, Millennials, Gen X, Boomers, and Silents—and What They Mean for America's Future

by Jean M. Twenge

45% more Millennials than Boomers have had 20 or more sexual partners at equivalent ages (see Figure 5.38). So it’s not just income that is increasingly unequal, but sexual activity (at least in terms of partners).