I think this is a mamalian thing in generalA lot of guys want to "own" women too. The thought of her moving on to another man is unbearable.
From horses
To deer
To seals
Lions
Wolves
Hippos
Gorillas
It' pretty much seems like most mammals on Earth either maintain a harem or have sex with as many other partners as they can, so I think it's an evolutionary thing. Some men can't stand the thought of losing one of their women cause it's a primal instinct they can't knock.