You also don't take that stuff very serious when you a teenager (Shiri mention that too
) I had to go for 2 years to extra lessons and church every week so that I could get my confirmation at 14 years. ( it's smilar to a communion or a Bar Mitzvah).
I actually buy a lot of groceries that are approved by a rabbi
I'm not super religious but I find it interesting that some people are, like Mayim Bialik. She is super Jewish.