I never bore my testimony. Several times I was "called" to the stand, to represent my age group, or as part of various callings, and I would stay seated, and shake my head. All the goading and humiliation in the world, would not make me lie.
It's sad to admit, but when I was an active Mormon I felt uncomfortable with long periods of silence in tesimony meeting so I would get up and bear my testimony. In addition, I was always aware of how recently I had borne my testimony, so if I hadn't done it last month I was more inclined to do it in the current month. In essence, I believe I was in to pleasing others and concerned about what other people may think of me if I didn't bear my testimony.
It took a few years after my excommunication to realize that this behavior was very sick. I suspect many "borne" testimonies suffer from the same affliction.