Bees go by smell. The new scent turned their keeper into an intruder, and they went for him.
A man tries the new aftershave his wife gave him for his birthday, pops out to get some food and is killed. How?
Give me a hintThe hint
Who knows him by his smell?
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He’s a beekeeper, and his bees didn’t know him
Source: Randy Whitaker, in Jed Hartman’s list of situation puzzles, no. 1.22