The article states that perviously, hair dyes and straighteners have been linked to breast and ovarian cancer. What are we to make of the fact that these are sex-specific cancers? (I realize men can get breast cancer, but from what I understand it is relatively rare.) Certainly it's reasonable to think women are at higher risk because they tend to use these products more. But does a carcinogen that targets the female reproductive system mean women are just inherently at higher risk, even adjusting for frequency of exposure?