My sons girlfriend gave my son naked pictures of her self fir his birthday. I don't know what to do!?

Honestly I think it's fine. You should be happy that they aren't having sex. She gave him naked pictures... I honestly don't see a problem with it. They're old enough to make their own decisions and I think he should be allowed to have the pictures. She sounds like a nice girl and he sounds like a nice boy. And to be honest, he's a teenage boy... He's probably looking at naked pictures on the internet on a daily basis! They're teenagers. Their hormones are crazy. They're commited and in love, and making good decisions not to have sex. I say, good for them!