I think even in the animal species, male animals are considered as the strongest in comparison to the female. if I adduce an example , let's take dog genealogy.. when dogs are having their intercourse, the male dog always dominating its female by riding her rear part of the body(we call it doggy position in sex).if the female dog wont submissive, then the male dog tempt to bite back of her neck hard. so obviously male dog is dominating there. while I'm mentioning these thing it came up in my mind a sinhala poem that was taught me by my grandfather. this is it..
බල්ලාට රජ සැප.. බැල්ලීට හරි දුක..
බල්ලාගේ ඇට දෙක.. බැල්ලීගෙ පුක උඩ..//