Agonophilia is the paraphilia involving sexual arousal derived from the act of fighting, or participating in or observing a combat sport, such as wrestling, boxing or kickboxing, martial arts, etc., or from viewing depictions thereof; from the Greek agonos (combat, struggle, conflict) and philia (love of).

Agonophilia often also involves the fetishizing of the equipment associated with combat sports (i.e. boxing gloves/trunks, safety gear, martial arts uniforms, etc.).

Sthenolagnia is the sexual arousal from the presentation of muscles or strength. Cratolagnia is described as arousal from the performance or demonstration of strength. These two sexual fetishes are not the same. Sthenolagnia puts more emphasis on the appearance of muscles. The assumption is the larger the muscle mass equates to being stronger. That is not always true in some instances.Both men and women can have this sexual fetish. People with different sexual orientations can have this fetish also. This is not a recent phenomenon. Words were just developed to describe something that has existed for many years. Magnus Hirschfeld (1868-1935) a German sexologist and physician who coined these terms in the 20th century, described what had existed for many centuries. Mainstream society considers this “strange” or “unusual.” This seems to be an exaggeration, when examining more harmful dimensions of other sexual fetishes. Misunderstandings can emerge because there is little scholarship on sthenolagnia and cratolagnia.