I like my coffee black-no-sugar, but sometimes my stomach doesn't like it as much as I do. I find that a dollop of cream prevents any stomach issues. I suppose by neutralizing the acids int eh coffee, but that's just a guess. Of course, this may not work for you if you're lactose intolerant.
I used to do that every day with my first cup of coffee, but for the perceived health benefits of the coconut oil, not the stomach thing. However, I stopped after my cholesterol shot up in my yearly labs, and this was the only thing I had changed about my diet since my last labs. That was right before the studies started coming out saying coconut oil wasn't as healthy as previously reported, so I just decided to cut it out altogether. For the rare occasion when coffee is bothering my tummy, if I'm going to add something bad, I'll add cream cuz it's yummy.