There's a very sad reddit thread where retail workers explained sad reasons people have returned things
One of the stories involved a man who had to return an engagement ring he bought the day before, because he found out his girlfriend was cheating on him.
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On an extremely sad note they shared a the story of an expecting father who returned baby furniture because the baby didn't make it.
Another story involved a woman returning clothes she bought for a cruise she was going to take with her boyfriend after she learned she was invited as a prank.
On a lighter (and grosser) note a woman tried to return crackers she had licked the seasoning off 0- but don't worry, the grocery store said no!