Mandatory sensitivity training

The company I work for is having another spasm of "mandatory sensitivity training." It has been awhile since we've been subjected to the sensitivity schtick. If one were cynical, one might note the utter absence of sensitivity training during the years that budgets were tight and the company's survival was on the line. But perhaps everyone just naturally becomes more sensitive (and requires no additional training) when budgets are tight. (There is a similar dynamic that keeps all of our scientific instruments in calibration until money becomes available.)

Anyway, would it suffice to point out that I have already been subjected to the sensitivity training? I have been trained! Isn't retraining redundant, a waste of my time and company resources? Apparently not, because the sessions are mandatory for everyone, regardless of previous indoctr... er, "training."

From the fact that we must be re-trained, some questions naturally arise. Is the retraining due to shortcomings or a lack of competence on the part of the initial trainer? If not, then it must be that "insensitivity" is the natural state of mankind, to which we revert after some period of years. Where might I find the study, published in a peer-reviewed scientific journal, documenting the employee time-sensitivity decay curve? Are there any other variables (such as budgets, see above) that influence this falloff in sensitivity? It would seem that awareness of these variables might allow us to schedule future training more effectively.