Perhaps because younger veins and capillaries are easier to accidentally inject into? https://www.sciencedaily.com/releases/2006/10/061031141826.htm https://ww

Perhaps because younger veins and capillaries are easier to accidentally inject into? https://www.sciencedaily.com/releases/2006/10/061031141826.htm https://www.sciencedaily.com/releases/2006/10/061031141826.h...