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Little inconveniences that bother you more than they probably should.
Automatic flushing toilet's.
I hate them! I cannot lean forward when taking a shit or else *WHOOOOSH*, I almost have to stay perfectly still in an upright posture, which is not comfortable!
And then when there is an unexpected flush, I wouldn't go as far as to say it's frightening, but I feel a jolt of anxiety similar to when you watch a horror movie and something scary suddenly happens.
Go..