No, but there are tons of squirrels so there exists a squirrel appreciation day.
If something garners enough interest then you can almost guarantee that it'll have it's own day, official or unofficial...but since there's something more significant going on here than just people with fetishes it's not a surprise.
Depends on your definition of fetish, if his butt is the object of sexual arousal then it's a fetish. It's not all whips and chains.
Anyway I think at the end of the day it's to observe the fact that people are different and shouldn't be afraid of expressing the fact that they are different. That's why there are all kinds of observances in the world.
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