My son was playing with a dog?

My son Theodore was with his hoodlum friends who eat gummy worms and watch mtv today, and one of them has a dog named Jellybean, which is juvenile, but anyway, he played with the dog. I saw him, gasped, and dragged him back to our house and ed him. Now he is probably full of germs! What should I do? I don't know what has gotten into him. Ever since he turned 15 and started hanging out with those hoodlums, he just isn't the same. He doesn't want to watch the teletubbies with me anymore, or eat tofu for dinner. He's started to watch mtv and goes on FACEBOOK! What did I do wrong!?