I’ve learned such a lot of new words since the children came along. When our eldest was tiny, he struggled with the word “milk” which came out as “knock”. He was a huge knock fan. For quite some time, my husband and I would unconsciously refer to the life-giving fluid in this way, causing confusion in public. I once asked for a little more knock in my coffee at a toddler group, and in an embarrassing moment, one of us bellowed “Can you grab two pints of knock?” when at the supermarket.