I'm going to give my friends 14 y/o son condoms and not tell him
Why do that behind your friends back?
He does not want his son to have condoms, so he cannot know.
I think that lying to your friend is wrong. You should just not give his son condoms since your friend is against it.
It is always more fun to do things behind the backs of others.
This is not a good thing to do. You would be breaking the trust of your friend by doing this. He may not want to be your friend anymore after this.