Anyone who is raised without religious indoctrination is likely not to understand the whole Catholic/ Christian guilt thing. I had to explain it to my partner when we first met because it was an odd phenomenon for him. He was not raised in any religion. He was astonished to find that there's this whole group of people that go through life carrying all this guilt around about various things. So you should count yourself lucky that you can't fathom all this guilt stuff.

“Now and then we had a hope that if we lived and were good, God would permit us to be pirates” -Mark Twain