From what i've read, this are guys in speedos, not nude. There is no reasonable expectation of privacy in a public place, even if you are under 18. As long as the material in the pictures does not violate the law, there shouldn't be a problem with it.
Not mention that at 15 they are already young men, not little boys. People here act as if being attracted to a teenager is sick, which is what most people think. It might be creepy when we are talking a middle age guy, but it certainly not unnatural, since they are already developed (at least most).
There really isn't alot of difference. I have to live my beard long so that people will know i'm a college student and not a high student. It might be illegal to have anything to do with anyone under 18 in the United States, but is certainly not unnatural.
Spain's age of consent is 14, France's is 15. Our sex laws are bullshit.
Mean while, we are prosecting teenagers for having sex between themselves, using the same laws that were designed to protect them. Almost every state have statutory laws that makes it mandatory to sentence 14 year old as adults. And many more states giving the DA ample discretion for most of the crimes.
Stop trying to follow up with the hysteria and nonesense, and see the reality.