Real Madrid star striker Cristiano Ronaldo has confessed that he does not have tattoos in order to be able to donate blood, which he does twice a year.

The Portuguese, know over his active participation in charity projects, revealed that to continue blood donation he needs to avoid ink on his body, 360nobs.com reports.

He was quoted saying in an interview by Diretta News:

"I don’t have tattoos because I donate blood very often."

It is worth mentioning that this precaution is taken by medics against the possible cross-contamination and diseases like hepatitis.

The 29-year-old also revealed during the interview with Spanish radio station Cadena Cope how the grief of his mate made him socially responsible:

"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. It’s a simple process and then you feel happy because you know you are helping another person."

It would be recalled that during the 2014 World Cup Ronaldo appeared on the field with a zig-zag haircut, which pattern reportedly is of the same look as the scar on the head of a young boy, whose brain surgery was paid in full by the footballer. Thus, Ronaldo allegedly made the hairdo to show support to the operated boy.

CR7 for life. Love you no homo