Passion of the Christ star explains a difficult topic. Just one of many horrors in the world today.
For those wondering if there is any truth to this concept, a simple Google search will bring up plenty of related topics. Here is one from The Guardian titled "Could Young Blood Keep Us From Getting Old?" Read Here
Also, ever see the movie Monsters Inc, where a very similar concept was portrayed? Don't forget, as the movie showed, laughter creates far more energy.