what is a monster within a human

My Sensei said this a man who only loves a woman by the way they look is a not a true man and if the man loves woman just 2 have sex with them is never a true man or a true human they are monsters trust me even monster noes wats good n wats bad. im just stating down my thoughts about this world and more when i do this i can keep my insanity down so that i myself can control my own  mind spirit and body its just that ive been goin thru certain changes that i take time to adapt to it