I found this on BBC and had to share:

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In October 1987 a husband assures his pregnant wife that he will put shelves in a tall kitchen cabinet in order to make into a storage cupboard. The shelves are finally put in by our son (the “bump”) when he is 16 years old. Over the 16-year period I heard an endless line of excuses. I could have done it myself, but I am dangerous with drills and cables, so tend to leave well alone. After all, he was going to do it and turned down a joiner friend’s offer to do it when I first mentioned it. Sarah Clark, near Morpeth, Northumberland
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http://www.bbc.co.uk/news/magazine-19396204