Should teenagers always tell their parents the truth?

In my opinion teenagers should sometimes tell their parents the truth because some things are not pleasant to tell to your parents because those things can be embarrassing.
On the one hand, you should tell your parents about your school marks and everything related to it. But you should tell them only what you want to say and you should not feel obliged to say everything.
On the other hand, parents shouldn´t oblige you to say the whole truth, but they should trust you .
In my opinion teenagers should tell the most important truths and hide the least important things.

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