more questionable science

http://news.sciencemag.org/sciencenow/2010/12/scienceshot-the-downside-of-manliness.html?etoc

The last sentence is unsupported. This presumes that female chimps are capable of knowing and detecting everything about their mates, including their internal parasite levels. This I think is frankly unlikely. They haven't even a causal relationship between testosterone and parasite levels, and even if there is, it's unclear in which direction this causality goes. In addition, it's perfectly reasonable that the females prefer the higher-testosterone males in spite of their parasite levels. Or it could be that the stress of keeping a harem or defending territory makes these male chimps more susceptible to these parasites.