UCHealer,
Welcome to the forum.
Very interesting question.
While flaring neither sitting nor standing ever bothered me.
However, what did bother me big time was any slight brush of body heat near my stomach, and likewise any brush of cold near my stomach.
What I mean by that is, if my little doggie would snuggle up close to me and her body (and therefore body heat) would even touch my stomach, that would be enough to start the cramps.
And likewise, if I was sitting in the car, and the a/c vent was pointed at my stomach, that would be enough to start the cramps.
Anyone else have this odd reaction?