At first many mothers sympathised. Hensintheskirting said: "Mine (nearly 6) was the same. Over the holidays I've played hardball and just told him to sort out his own bum.
"Playing is more fun than sitting on the toilet for ages waiting for someone to come and wipe your a***..."
And Elspeth Flashman agreed saying: "You are not being unreasonable. Recently I was in a friend's house and her hale and hearty seven-year-old roared at her from the downstairs loo 'MUUUUM! WIPE MY BUM!'
"It wasn't very edifying for anybody."
But then some mothers began to confess that they were guilty of wiping their older children's bottoms.
Mummyoflittledragon said: "I help DD (darling daughter) if it's a bit 'squadgy'. She's eight. It can become a habit if I'm not careful. I'm too soft, I know."
But it was user Javabeansaintgeorge who really provided the shocker.
She admitted: "I wipe all my kids, oldest is 12 and is c**p at the best of times. It would be cruelty leaving him dirty when he has an upset stomach."
But other Mumsnetters were up in arms. Jinkxmonsoon said: "Honestly, I'm shocked.
"Firstly that these 12-year-olds aren't utterly mortified at having their a**** wiped for them but also at how a 12-year-old with no special needs could be incapable of wiping themselves? It's not that difficult is it?"
Most children are expected to be fully toilet-trained, including wiping their own bottoms by the time they start primary school.