What is the ruling on flirtation between boys and girls from both sexes, and who is responsible for the spread of this phenomenon?

Flirting with girls is a bad habit and a widespread major sin, stemming from weak religious deterrence and corrupt upbringing, with media contributing to its spread. The flirting young man often does not maintain his prayers, nor does he lower his gaze, and he wastes his energy on what is not beneficial. He will be questioned on the Day of Judgment about his life and his body. To get rid of this affliction, one must lower their gaze and seek lawful marriage. Girls must fear Allah and not be soft in speech, nor display their adornments, nor show off their beauty to men, so that they do not partake in the sin and incur Allah's wrath.