A dirty mind is a terrible thing to waste151;and these puzzles are just the thing to prove it Simply put, Paint-doku are logic puzzles that reveal a naughty picture at the end. Complete these puzzles and get ready to blush: each answer shows some pixilated adults doing very adult activities So put the kids to bed, make sure grandma is in the other room, and get ready for some brain-bending, mind-blowing, old-fashioned puzzle solving.