If i had intercourse with a teacher and we recorded it would it be legal to post on the internet or is that illegal. (we are both boys)?

If you're a minor? It's illegal.

It's technically not legal to have the intercourse in the first place, since it's with a teacher.

Ha ha. Very funny. When I was a little boy I was molested and raped by a man who groomed his way into my family by becoming a very close friend and eventually my carer. I don't think many victims of sexual abuse find this kind of troll funny,

Nobody wants to watch troll sex.

it's illegal to have intercourse with a teacher so...

If the participant is underage, it's illegal. Posting it would be evidence at court that you, in fact, had intercourse with a teacher.

Posting the video may not be illegal, depending on your age at the time. The teacher HAVING sex with a student is illegal, and anything you post is admissible in court as evidence.

Creation and distribution of child porn dear. 15 -30 in prison for a first offense. Worth the A?

If a participant was under age, its illegal.