I forget what the Chinese call it but there's them and many other cultures that practice not spilling the seed too often. It's only cac doctors that started this entire "yeah go ahead, buss all kinds of nuts, there's no repercussions. In fact, its healthy!" Lie. Porn is unnatural and can destroy our built in reward system by overstimulating it.
I mean, is it not evidence alone that semen is part of the reason we all even exist here? Unless you have the perfect diet for your genetic/molecular structure and live in an optimal environment why strain the body more than it need be? Isn't the point to live as long and healthy as possible? All types of minerals, spinal fluids, etc in that shyt.