morality is subjective and people don't have free will

[Aroura]

Did you not go to church until you were 6 or 7? My mom took me as far back as I can remember, and there were kids masses, too, but still went most Sundays. (Kids masses were Wednesdays)
I was confirmed at age 7.  You pretty much have to already know the doctrine to go through that ceremony, and that is the standard age to go through it.  No Sunday School, or anything like that?

It's taught right form the pulpit, pretty regularly, to people of all ages.

I'm completely teasing, but I have to ask, what kind of Catholic are you?  lol

I received first communion when I was 8, so my Mom started taking me regularly after that. Before then, I used to stay home on Sundays with my dad because he didn't go to church regularly back in those days. Prior to first communion, I only went during school when we had little 30 minute masses once a month (I went to a Catholic school), or when it was a Holy day like Christmas or Easter and it was a family event.     

I remember being in church when I was super young, but coming to understand everything that was going on was certainly a process.

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Oh, and no. No Sunday school, just Catholic school from Kindergarten to 8th grade.

Right, well of course kids don't fully understand it even at age 7 when the church says you can.  But your personal example seems a bit funny to give considering you are basically saying you didn't get normal exposure to it prior to age 8.

Most kids hear about it and learn about it well before age 8.  Look, the RCC says kids can be confirmed at age 7. Before you can be confirmed, you have to learn a TON of stuff and be able to recite it back. It's not a one week program.  
Most Christian children hear the word sin from they day they are born.  It's just part of the Christian vocabulary.  I'm glad you weren't exposed to it terribly young, though, you also aren't getting the nuanced meanings here.

Like, if I say I'm sad, or morose, grieving, or melancholy, they all technically mean pretty much the same thing, but they all have different flavors, and mean something slightly different.  

Sin is not directly equal to misbehavior, wrong, etc.  It has it's own very specific meaning, even more so than the sad example.

Just spinning my wheels, though.  

Edited to add, Wait I somehow missed your addition.  You went to Catholic School starting in Kindergarten and never heard of sin?    Hm.  sI went to a Catholic School as well, and it was a good one.  I have no resentment about it, I got a good education there.  But religious studies were part of the curriculum.  Like 1 hour a day, and sin is certainly discussed in at least first grade.  Kinder I don't remember much except sleeping and eating snacks, lol.