Either they have to invest lots of energy in expensive displays, which then make them more vulnerable to predators, or they get injured and even killed in fights with other males. (sciencedaily.com)
He will not get into as many fights with other male dogs and will not chase females in heat anymore. (wooftopia.ca)
If you allow an intact male cat outside, it often has violent fights with other males. (spotsociety.org)