The document discusses "fangirls", female fans who are obsessive about fictional characters or celebrities. It notes that while fangirling can sometimes be taken to extremes like depression or social isolation, it is not generally considered a mental illness. The objective is to show that fangirls do not have mental disorders and should not be seen as crazy. The causes of fangirling are explored, like connecting with others online, as well as the neurological effects of experiencing strong emotions from one's interests or idols. While a few extreme cases exist, most experts say fangirling is a normal human reaction and not a medical condition.