That's what YouTube users David and April Wile and Maciborka have captured in this hilarious compilation of babies experiencing lemons for the first time.
The clip - appropriately called Pucker - starts with the kids studying the fruit with curiosity before mustering up the courage to take their first bite.
Watch their little faces go from bad to ugly as some of the babies are disgusted by the sour taste - with one poor boy bawling his eyes out.
The video has already gained 125,000 views on YouTube and counting.
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