Thread:Monkey D. Luffy;Gomu Gomu No Mi/@comment-25768713-20150614065848/@comment-29331244-20150614083911

Draw a set of 4 squares in papers. Write 'B' when referring to boys, write 'G' when referring to girls. Now write all possibility that 'B' or 'G' could be in each squares. You will noticed how it worked.