Can You Get Pregnant By A Man Youve Never Had Sex With

Women's Dating

Can You Get Pregnant By a Man You’ve Never Had Sex With?

Dr. Wendy Walsh

Written by: Dr. Wendy Walsh

Dr. Wendy Walsh

Known as America's Relationship Expert, Dr. Wendy Walsh is an award-winning television journalist, radio host & podcaster, and the author of three books on relationships and thousands of print and digital articles. More than 1.5 million people follow her sage advice on social media. She holds a Ph.D. in Clinical Psychology and teaches in the Psychology Department at California State University Channel Islands and has been the host of "The Dr. Wendy Walsh Show" on iHeart Radio's KFI AM 640 since 2015. Walsh is also a former Emmy-nominated co-host of "The Doctors," as well as former host of the nationally syndicated show "EXTRA." She was named a Time Magazine Person of the Year in 2017 after speaking out about harassment at a major news network.

See full bio »

Edited by: Lillian Castro

Lillian Castro

Lillian Guevara-Castro brings more than 30 years of journalism experience to ensure DatingAdvice articles have been edited for overall clarity, accuracy, and reader engagement. She has worked at The Atlanta Journal and Constitution, The Gwinnett Daily News, and The Gainesville Sun covering lifestyle topics.

Discuss This! Discuss This!
Advertiser Disclosure

What a crazy title for this blog. Any normal person would automatically assume that aside from mixing a cocktail of sperm and egg in a fertility clinic, if a woman were to become impregnated by a specific man, she must have had sex with him. Right? But, sigh, reproductive life is not that cut and dry.

In the new book “Why Is the Penis Shaped Like That? And Other Reflections on Being Human,” psychologist Jesse Bering Ph.D. makes an elegant case that the evolution of the penis head evolved as a way to combat the fact that as a species we humans tend to have a lot polygamy or at least a system of “perceived monogamy.”

In this fascinating read, Dr. Bering describes the penis shape as if it is the world’s best plunger and scraper.

“Only the human species has a distinctive mushroom-capped glans, which is connected to the shaft by a thin tissue of frenulum,” writes Bering.

And then he goes on to explain that evolutionary anthropologists and psychologists speculate that the large glans forms a ridge all the way around the shaft — a perfect tool to scrape the inside of the vagina of any other man’s sperm.

This would clearly put a man’s own baby juice at an advantage. Scrape away the last guy’s ammunition and shoot your own rocket deep into the vagina.

There’s only one problem.

What to do with that other man’s sperm that has accumulated under the ridge of a head and (in most cultures) is safely tucked away at the perfect temperature under a foreskin.

The obvious answer, of course, is to take a shower, push back that foreskin and wash away your competition’s troops. If only all men were so hygienic.

Instead, remnants of another man’s sperm can accumulate under the foreskin and be accidentally left inside the next woman the man has sex with. Really. According to Bering, it’s possible.

And there you have it. One study showed that approximately 10 percent of babies born in US hospitals do not have DNA that matches the doting Daddy cooing at their hospital cradle.

Now you could surmise that plenty of this is due to good old-fashioned infidelity. But who was unfaithful? The mother or the father who pulled some other man’s sperm out of his mistress?

Hmmm…makes one think, doesn’t it?

Advertiser Disclosure is a free online resource that offers valuable content and comparison services to users. To keep this resource 100% free, we receive compensation from many of the offers listed on the site. Along with key review factors, this compensation may impact how and where products appear across the site (including, for example, the order in which they appear). does not include the entire universe of available offers. Editorial opinions expressed on the site are strictly our own and are not provided, endorsed, or approved by advertisers.

Our Editorial Review Policy

Our site is committed to publishing independent, accurate content guided by strict editorial guidelines. Before articles and reviews are published on our site, they undergo a thorough review process performed by a team of independent editors and subject-matter experts to ensure the content’s accuracy, timeliness, and impartiality. Our editorial team is separate and independent of our site’s advertisers, and the opinions they express on our site are their own. To read more about our team members and their editorial backgrounds, please visit our site’s About page.