It doesn't have to be, but as a Christian myself I can tell you that there's a lot of guilt and "this is bad" in the Christian upbringing that is actually not Biblical but still taught, which is why I asked.
Couldn't have put it better myself. Grew up Catholic, but now only really consider myself Christian in that I still believe in God and try to do good, but as you mentioned there is lots that is taught which shouldn't be. Took many years to deprogram some of those things...especially the parts about sex being 'wrong' and that it is 'bad' to want/desire it.

