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Cristiano Ronaldo is enjoying a vacation with his family on a yacht, and during this time, the Portuguese caught attention with his painted toenails.

Ronaldo's painted toenails are not driven by a desire to follow fashion but rather by a more substantial reason. Bild claims that Ronaldo does it for hygiene purposes:

"Many star athletes do this to protect their nails from fungi and
bacteria when they spend hours in sweaty footwear. Even Mike Tyson
does it."

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UFC fighters also paint their toenails - it is believed to help prevent cracking or splitting of the nails during fights. When a layer of polish is applied, the toenails become stronger, reducing the risk of damage during a bout.