A devastating age-reversing disease has regressed a pair of middle-aged brothers back to their childhood.
Former RAF serviceman Michael Clark, 42, became homeless and now acts like a 10-year-old.
While Matthew, 39, lost his job as a factory worker and started behaving like a toddler – despite having a 19-year-old daughter, Lydia, who is expecting a baby.
Their tragic situation mirrors the Brad Pitt film The Curious Case of Benjamin Button, in which an old man keeps growing younger.
The brothers now spend their days watching episodes of The Smurfs, eating crisps and playing snakes and ladders because Cluedo is too difficult.
Dad Anthony, 63, who looks after the boys with mum Christine, 61, said: “They’ve gone from being fully-functioning adults, with jobs, careers and getting married to going back into a childlike state.
“Matthew went out the other day and bought himself a train set and a Mr. Potato Head. Things which interest a toddler interest them. The other day Michael saw a balloon and pointed it out to us.”
The former prison worker, from Lincoln, added: “Matthew also has awful episodes where he screams, ‘I don’t know what I’m doing’.
“It is like an adult having a toddler’s tantrum. There’s nothing we can do to help and we feel absolutely powerless.”