Becuz man and woman prefer freedom no need see each other bad habits. E.g man stand and urine so sometimes a few drops kena toilet bowl edge. Woman sit and urine and saw those stains cannot tahan no hygiene so kick up a quarrel!
Then woman period come toilet bowl dirty faster than normal but they can take it I cannot as I like to sai in a clean and white toilet bowl. Got mood sai will come smoothly else it run back in don't come out.
So such little habits both man and woman cannot stand each other imagine hubby and wife!!!