Logically, I know we shouldn't infantilize teens or their sexuality, but urrrrggghhh. It's a tricky issue.
To me, the most rational approach would be realizing that teens, as you described, have **** judgement, they simply don't have the experience necessary to form good judgement, and are subject to raging hormones at that age, which doesn't help their judgement skills.
To me it seems that, rationally, there should be fairly tight restrictions on Adults engaging in sexual activity with teens, linked to the age of the teen, and the age differential between the teen and adult. Regulations regarding consensual sexual activity between peers should be more liberal, and not subject to criminal penalties. AoC at 16 with a limit of 4-6 years age difference, and hard AoC of 18 seems to me to be the best compromise between recognizing the validity of teen sexuality, and protecting them from manipulation by adults.
My state has laws fairly close to that. For younger teens (13-15 IIRC), there's a 2 year age difference limit for sexual activity, which seems reasonable. There is a hard AoC of 16, with a qualification of a 6 year age difference limit if the older person is in a position of authority (teacher, guardian, etc.). I'd update that to flatly prohibit sexual activity if there is a person in a position of authority, and make the 6 year age difference ubiquitous. 18+, of course, would be age of majority, so no limits there, except, again, for an abuseable position of authority.
Regarding images/video, that's a little tricker, and in my mind ultimately comes down to "society should get over these stupidly puritanical attitudes toward nudity". Again, 16 seems reasonable for "selfies", with 18 a hard limit for photo/video of others. And, in
all cases, consent of the subject is critical. Taking or distributing photographs or videos of
anyone without their explicit consent should be subject to penalties, with aggregating factors if the images involve anyone under 18, and obviously child-porn penalties for pre-pubescents and adolescents.