I think it's a normal reaction actually. I feel a bit of the same thing and my idea is that it might be related to an uncomfortable feeling of not being sure a

I think it's a normal reaction actually. I feel a bit of the same thing and my idea is that it might be related to an uncomfortable feeling of not being sure about the nuance or value of a word. 'Shit' is a known word in terms of meaning but what value it carries in any given context is a bit fuzzy, it can be received very differently.