Come on then 411A - if it is so basic you should be able to pound out on your keyboard blindfolded, the details of the structural reasons for MZFM and MLM being somewhat different to us mere mortals. And master, while you are at it explain to my plebian mind the structural situation with regards to high wing jet aircraft (BAe146, C5, C141, IL76 etc) given that there is no bending moment from the undercarriage at touchdown.
