Final answer:
Treatment for paraphilias is sought when they cause distress/harm, interfere with daily functioning, or stem from a medical condition. It is not commonly treated when the behavior is considered a cultural norm.
Step-by-step explanation:
Treatment for paraphilias typically occurs under specific conditions, barring one in particular from this list. First, when the paraphilia causes distress or harm to the individual or others (1); second, when it interferes with the individual's daily functioning (2). It is also appropriate when the paraphilia is a consequence of a medical condition (3). However, treatment does not usually occur when the paraphilia is considered a cultural norm (4), as these behaviors may not be seen as abnormal or harmful within that cultural context.
Societal norms influence the perception of what is deemed a paraphilia, and therefore, when it warrants treatment. This understanding has evolved over time, with homosexuality being a prime example of a behavior once classified as a paraphilia but now recognized as a normal variation of human sexuality.