For me it is the fact that our blood contains iron. I earlier used to believe the word stood for some ‘organic element’ since I couldn’t accept we had metal flowing through our supposed carbon-based bodies, till I realized that is where the taste and smell of blood comes from.
Between Japan and the EU, there is an ocean. You also need to swim, not only walk.
Swimming is walking in water /s
Maybe he plans to wear a weight belt.