History of boxers’ benefits

When Muhammad Ali, then Cassius Clay, knocked out Sonny Liston in the first round of the 1965 World Heavyweight Title fight, he was on his way to one of the most illustrious, and ultimately bruising, careers in boxing history.

His development of Parkinson’s disease has been linked to his 22 years spent in the ring.

But if you’re a guy looking to start or expand your family, when it comes to your underwear, it’s briefs that are bruisers and boxers that help you dodge serious damage.

We told you a couple years ago that guys who wore boxers during the day and slept naked at night had 25 percent less DNA damage to their sperm than men who wore snug briefs around the clock. Well, we now know that boxers go a couple rounds further.

Researchers at Harvard’s T.H. Chan School of Public Health have found that not only are boxer-wearers’ sperm healthier, but those guys have a 25 percent higher concentration of the healthy sperm, a 17 percent higher total sperm count and 33 percent more swimming sperm than men who wear tight-fitting briefs.

The reason? Sperm is sensitive to temperatures above 92 degrees. Your body is normally 98 degrees, and briefs keep the testicles close to the body.

Boxer shorts are looser and cooler, and get close to allowing for the au natural position of the testicles, which is down and away from the body.

In short, it’s no contest: Wear boxers for better sperm.