I do not see the comparison here. My stallion is in a pen next to my mares and geldings. They can get nose to nose and he has socialization. Of course with that comes the mares driving him crazy and him teasing them - he is not breeding anything this year- he is perfectly fine and well adjusted. Sure he gets himself into a bit of a frenzy and then realizes he can not get thru the fence and moves onI guess if you really want to know why some of us think that it is cruel, you could ask your husbands.