Christiano Ronaldo reveals why his bod is inkless.

In a recent interview with spanish Radio, Cadena Cope, the football star revealed the reason why he had no tatts.

The football star says his efforts to help children conquer debilitating diseases by donating his blood leaves him no choice but to go ink-less.

"I don’t have tattoos because I donate blood very often," he said, while also taking the time to share a photo on his Facebook page that showed him donating at a hospital. 

That doesn't end there. The Real Madrid FC sportsman also donates bone marrows to kids inspired by a teammate's son's struggles.

"It was the time when Carlos [Martins] was with us on the national team. He told us about the problem with his son and we, the players, showed great unity to help him and his son because we knew it was a very complicated situation.' Donating bone marrow 'is something a lot of people think is a difficult thing to do but it’s nothing more than drawing blood and doesn't hurt.’ "It doesn’t cost anything," he added. "It’s a simple process and then you feel happy because you know you are helping another person." He said.