A woman was left fuming after reading through a song sheet given to her five-year-old niece and her classmates.
The song - designed to celebrate Mother's Day - came under fire after it was shared on social media yesterday.
It dubs her as sometimes "stressy" and "grumpy", and continues "she may not have a degree, but she helps with my homework, and that's what matters to me".
In another line, the singer praises their mum for her domestic abilities; "she does all the cleaning and shopping, and makes a wonderful tea!"
Sophie Hill shared a photo of the lyrics on Twitter, where she highlighted the "bizarrely sexist" lyrics her niece had been expected to sing.
She then contrasted this with a Father's Day song which was produced by the same company, Out of the Ark Music.
Sophie, who is completing her PhD at Harvard University, noted it gives "no mention of any caregiving tasks here but it does make sure to specify that dads are 'clever' and 'genius'".
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Many were left unimpressed by the song's lyrics - and shared their thoughts on social media.
One dad wrote: "While I’m sure this is innocent, we need to get over stereotypes like this, or we will never move on from 'mum makes the dinner and cleans the house'. I don’t want my girls to think that is what their 'job' is".
Another commented: "What? When was this, the 50s? I wonder if they have differentiated lyrics to sing to graduate mums, working mums, real mums, and real families where someone else might make the tea?"
A third added: "Not only is it ridiculously sexist, but it also has an 'I love mum because she does stuff for me' vibe".
Others have taken to "fixing" the lyrics with new lines of their own, with one particularly humorous rewrite reading as follows: "My Mum's one in a million This song's a ruddy farce She's coming to school tomorrow To stick it..."
Company Out of the Ark Music told the Mirror: "We are aware that the song ‘My Mum’, published by Out of the Ark Music decades ago, has been the cause for some concern and for that we are truly sorry.
"We recognise that the lyrics in the song are outdated, inappropriate, and don’t reflect the invaluable and different roles women play in society. It also does not represent our current values and ethos as a company.
"For a number of years now we have not promoted this song, [have[ taken it out of our new digital platform, and have proactively communicated with schools to suggest free alternatives.
"As a business, we work hard to instil wholesome values in every song we write, but we recognise that times change, and as a result, we regularly audit our songs to ensure these values are upheld.
"Unfortunately, we can't remove printed product that was sold and is still in circulation. While we cannot control the songs that schools choose to use, we will continue to promote and encourage the use of alternatives".
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