there is no answer, it originates in a r e d d i t thread:
"It's from an Ask*** thread asking about what you most useless talents are.
A user commented that he had a compulsive tendency to count the no. of letters in every sentence, and specifically notice the 10 letter words.
From that point on, people started calling out 10 letter words from the aforementioned thread."
https://www.***.com/r/Ask***/comments/4eqmpd/what_is_your_hidden_useless_talent/d22g0pf/
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