Most men and women don't have 30 bodies. On both sides it's a relatively small percentage of people hooking up with each other a lot and accumulating large body counts. A lot of people are out here exaggerating and/or just having sex infrequently or not at all. We would see a lot more pregnancies, births and abortions.
"Americans report using far more condoms than are sold every year. You might therefore think this means they are just saying they use condoms more often during sex than they actually do. The evidence suggests they also exaggerate how frequently they are having sex to begin with. About 11% of women between the ages of 15 and 44 say they are sexually active, not currently pregnant, and not using contraception. Even with relatively conservative assumptions about how many times they are having sex, scientists would expect 10% of them to become pregnant every month. But this would already be more than the total number of pregnancies in the United States (which is one in 113 women of childbearing age)."
What can we learn about ourselves from the things we ask online? Seth Stephens‑Davidowitz analysed anonymous Google search data, uncovering disturbing truths about our desires, beliefs and prejudices
www.theguardian.com