That's because, as Euphoria has repeatedly shown, if you send nudes, evil people will use them to hurt you and the law might not protect you. Not to acquaintances on the internet or IRL.
are all very bad, but there's one problem that these characters keep encountering that, in the terms of this show, appears to have an easy fix: If you're underage, never send nude selfies. Yes, the toxic masculinity, the drug addiction, etc.
HBO's 'Euphoria' Made Me Feel Old and Scared.