Finish this lecture, go outside, and unexpectedly get gored by an elephant, and you are going to secrete glucocorticoids. There's no way out of it. You cannot psychologically reframe your experience and decide you did not like the shirt, here's an excuse to throw it out - that sort of thing.
"Stress, Neurodegeneration and Individual Differences". Robert M. Sapolsky's lecture at Washington State University, October 10, 2001.