It's especially absurd in some jurisdictions where it is explicitly legal for two teenagers to engage in intercourse, but if they share a photo of tits with each other other they've committed a federal crime. The fact we consider a photo criminal, when both parties are above the age of consent for one another, is a new level of absurdity, and things like the EARN IT act just make this situation worse.
I have a teenage daughter. I don't particularly relish the idea of her taking and sharing nude photos because I know that the Internet is forever and it will eventually get out and cause her harm. Nonetheless, there is very little I can do to stop it short of blocking her from using technology altogether. What I would like even less is if the company I buy her phone from decides to be a busybody and reports her to the feds for taking a nude photo of herself and then she ends up with a felony record and registered as a sex offender for the rest of her life for getting a bit too spicy in text messages with her boyfriend.
I don't understand how anyone could classify this as CSAM.