If you search the LactNet archives, you should find some posts about bras
and breast cancer, where we discussed this gentleman's research.  It is not
exactly A+ in terms of scientific method, but quite convincing, nonetheless.
His book suggests that breast cancer is caused in part by bra wearing,
because of the obstructed lymph drainage.
Katherine A. Dettwyler, Ph.D.
Associate Professor of Anthropology and Nutrition
Texas A&M University