[W]hether you’re 16 or 40 when you decide to have sex for the first time, you may think the choice comes down to your partner, the people around you and the environment you are exposed to. That’s part of it — but scientists are increasingly realizing that your genes also have something to do with it.
Your genetic coding helps define the timing of that milestone moment, as well as when you first have children — and how many you have — as well as your actual functioning during sex.
“It’s clear genes are an important factor,” said John Perry, a geneticist at the MRC Epidemiology Unit at the University of Cambridge. “People think it’s all choice-driven.”
“There are core biological pathways underpinning what we believe is mostly societal and cultural,” he said.
Perry’s team recently conducted a study in which they analyzed the genes of more than 125,000 people whose personal data are stored in the UK Biobank…
“We showed that 25% of variability was down to genetics,” Perry said. “So genes do play a significant role in your reproductive behavior.”
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