My mum told me she heard this recently, couldn't remember where. I was quite against ds having one (even though he was given 2 at birth) as I believe they can be a brilliant breeding ground for bacteria and create utter havoc when it's time to live without them. However if you have any opposing advise I would love to hear it!
He's been unwell for a couple of days and has loved snuggling in to his shawl...