Replies to 'General Advice'

my son is now not only noticing things about other people, which he has been doing for awhile, but now is is asking questions that i can sometimes answer, but comments i cannot get him to stop, he will say people are fat, and i tell him that not a nice thing to say, he says hes sorry, and a few weeks will pass and he'll say it again.  he told his cousin who is the same age as him that her hair is ugly because its curly, and she told him her mommy said she had beautiful hair and ignored him, and once again i talked with him, and he hasnt said it sence, but that was onyl a few days ago.

in other ways,  he is very well mannered, for example, a few days ago he heard someone ask" is she hot" and he spoke up and said no...shes beautiful. and he is always correcting people if they say something he considers mean, or is the use bad language, he'll tell them its not nice. or if someone calls someone a name..even a brat or something, he speaks up an says that it hurts their feeling so be good. so its like he knows, but he doesnt listen to himself at times, and im not sure how to get him to stop, because saying those things could really hurt a persons self esteem, especially if said to another child.

any advice???