a short conversation about iron

Grant:  "Can I have a thigh?" 
Me:  "No, I'M going to eat it." 
Grant:  "But you already ate one thigh!  Why do you get two thighs?" 
Me:  "Because I need it." 
Grant:  "So do I!" 
Me:  "Do you shed copious amounts of blood every month?  Does your uterine lining slough off once a month?  Because if not, then you don't need it as much as I do." 
Grant:  "Do you think that's a good subject for the dinner table?" 
Me:  "Menstruation trumps Growing Boy."