As you propably already know, the hormone Oxytocin makes you feel well and have an influence on emotions. It is know to be produced by e.g. touching. Oxytocin level have larger effect on women, due to their lower Testerone levels. Since corsets do put a pressure on the skin, and perform some sort of caressing during motion, it could have an effect on Oxytocin level. But so far, it has not been investigated if corsets or tight-lacing have any effect on the Oxytocin level.