You are looking at tattoos on the back of the neck of gymnast Vanessa Ferrari of Italy as she gets ready to compete in the uneven parallel bars competition. For those who are a little slow on math, this means that this is her FOURTH Olympic Games appearance in what is unquestionably a highly competitive sport (women's gymnastics) where youth and flexibility are the hallmarks, and even an infinitesimal decline of either of these can quickly and permanently relegate one to the "former gymnast" column.
Her first appearance was in Beijing in 2008, at age 17. She is now 30 years old (will be 31 in November), and while I commend her for maintaining such a high status in such a discipline, remaining competitive into her thirties, a quick check of her Wikipedia biography sums it up. Putting it bluntly, since the age of 13 (and obviously far earlier; you don't get to that level overnight), her entire life has been nothing but gymnastics.
We have gone from a time where the modern Olympics, as envisioned by the Baron de Coubertin, were a bastion of amateur sports (in theory if not in actual practice), to the present, where the Olympics have become just another sports exhibition/festival inhabited exclusively by unapologetic professionals. And I say "Fehhhh" on that.

-"BB"-