5. No, Olympic swimmers aren’t covered in massive hickeys

Even though it seems like a reasonable explanation when you consider the 450,000 condoms being distributed within the Olympic village, instead, the splotches are the after-effect of the newest Olympic fad: cupping (yes we know, it even sounds gross). However the process itself is not a fad, it’s been done for at least 2,000 years along with other forms of traditional Chinese medicine like acupuncture. Similar to other forms of TCM, cupping doesn’t have a lot of rigorous clinical data to support it yet. The randomized clinical trials investigating cupping tend to have high risk of bias or small sample sizes, but according to those — and apparently Michael Phelps — it’s great for pain relief.