#6. Semen can increase lifespan
Semen contains spermidine, which has been found to increase lifespan. Spermidine has also been found to reduce the amount of aging in yeast, flies, worms, and human immune cells by inducing autophagy.
It is a longevity agent due to its ability to regulate gene expression. Other good sources of spermidine include grapefruit juice and tempeh.