The man is a crackpot and a con artist, so anything he says on this topic is less than worthless.

Anyway, fascists are always obsessed with their stunted concepts of virility. Look at the racist concept that Black men are more sexual than white ones, or Alex Jones's gay frogs rant.

Here's a real fact: there is a strong correlation between a man having higher percent body fat and lower sperm motility. And if you look at long-term trends relating to body fat percentage, they're rising like mad in the US and at a slower rate in much of Europe. Some of that might be lifestyle issues such as longer working hours and higher stress, but there's also some evidence that certain nearly ubiquitous chemicals act as hormone disruptors.