Now that is something else. I walk at my own pace, which is usually much faster than other people's. It's extremely difficult for me to match another person's pace. That's another thing which makes it difficult. I also have to remember to walk at their pace, instead of my own, as well as pay attention to what they're saying.
And yes, it is irritating when they're blocking the hallways or sidewalks. In school, I hated to try to get passed them on the way to class. More than once I told people the hallways are for walking to class, or getting from one place to another, not to chit chat.
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"Of all God's creatures, there is only one that cannot be made slave of the leash. That one is the cat. If man could be crossed with the cat it would improve the man, but it would deteriorate the cat." - Mark Twain