Hello there, may I help you?
Your son has witnessed a video which is completely inapproriate for his age and understanding, he probably thinks at 6 years old it is funny to share what he has seen with other children in his class. He probably has no concept of the seriousness of what he has actually done.
Although you do need to deal with the situation if you make too much of it you may cause more harm than good. I think you need to sit him down and explain that that video was an adults video and was not something you would ever want him to see as a little boy. Also explain that it has upset teacher and children in the class and caused him to get into trouble and must not happen again.
It is more important to talk about the situation so he fully understands the seriousness of the situation rather than punish him.
If you consider what he has seen in his immaure understanding he probably thinks it very funny to see a girl licking a boys private area. However others may not see it like this, especially other parents of children in his class.
I would advise getting him to write a letter of apology to the principle of the school to demonstrate that he recognises he has done wrong.
As for other parents of children in the class, they should not be told who disclosed the information, if parents do find out, all you can do is sincerely apologise and reassure them that you have dealt with the situation and it will never happen again.
Its important to remember that your son was not trying to cause upset to anyone with this knowledge, more trying to be funny and show off.
I hope this has answered your question. Please accept if I have, if not please let me know how I can assist you further.
Yes I think they would be right saying he was probably very embarresed and ashamed when he got into trouble.
I hope you get the matter sorted soon and it passes out of the limelight at school as soon as possible.
Your welcome, do contract me again if you need further advice, I would be happy to help.