David Beckham: My Kids Don't Write on Walls ... They Write on Me! (PHOTO)

David Beckham isn't just a beautiful man, he's a beautiful canvas for kids ... whose doodles just became his latest tattoos.

Becks showed off his fresh ink -- a drawing on his hand by daughter Harper and a "We love you Daddy" scribbled by his boys on his ribs. DB already has a ton of tatts, but bragged about these ... "Apparently Harper is allowed to scribble on daddy" and "The boys expressing how they feel about daddy."

Go ahead and pickup "Celebrity Father of the Year" award now, while we admire your body of work.