Submerging testicles in water, such as in hot tubs or baths, is detrimental to fertility due to direct heat transfer.

“I took infertile men with low sperm counts and stopped the tubs. They were in hot baths because I used the word jacuzzi. Jacuzzi called me up and said stop. Don't use that word. So I don't use that word. So hot baths or tubs. And I told them out and they went up 300%. Their semen announce semen quality went up 300% total motor count in 3 months or four months and 600% at 6 months.”

“The worst one of those is anything underwater, submerging underwater because you're one centimeter away. You're a liquid. It's a liquid. You're going to turn that temperature.”