No, I'm going with old people being grouchy and tending to be impolite, also

. It's excusable in some ways -- I hasten to add! It's just that every little, dang thing seems difficult ... and, those things are more and more difficult to tolerate. DW says that all old people are impatient. Well, yeah - if everything we do takes longer and our actions are more subject to error, compounding the difficulties. If others toss interference, needs, even expectations into the swamp - we become impatient!
I think that as we get older, we tend to tire of subtlety, throw tact to the winds, and take the shortest path between two points. Dang the torpedoes! Full speed ahead!

Fortunately, I'm still able to (usually) override any impulse for brash incivility... especially when polite well-placed snark can serve as well.
This is a fascinating thread. I've had a lot of interesting dreams that I can remember over the years... some as vividly as if they really happened. When I was young(er) I had two different serial dreams, where I returned several times to a place I had dreamed of before. One of these was that I fell asleep leaning against a tree, and the tree grew roots into me, and began to communicate. It told me that its name was Thrash, it was the communal consciousness of the forest, and needed my help to fight the loggers which were killing it. (This probably due to all of the time I spent in my Grandfather's 280-acre forest as a child.) For me to help, Thrash gave me the power to control insects and small animals, to use as weapons. There were several battles, where among other things, I used birds & wasps to drive off the loggers. I think it would have made a good movie.
I've almost always had lucid dreams, where the dream setting was not under my control, but I could "steer" the direction it evolved from there to some point. Sometimes I could recognize the places, sometimes not. What I find odd is that the places or situations I do recognize are most often in the distant past. While I was in the Navy, I never dreamt about being on a ship; now, 30 years later, I dream of a ship, or of being at sea, fairly often. There may be something to what
@flowerbug mentioned, about dreams being a form of mental housekeeping - cleaning out the cobwebs of memory.
Some common themes in my dreams... Often things abruptly change for no reason, such as following a road in a car, and suddenly finding myself riding a bike on a path instead. Or walking into a room, which is suddenly re-arranged. Putting something down (usually clothing) only to have it disappear. And of course, possessing something valuable, and trying vainly to hold onto it as I wake. Sometimes the occurrence of something impossible makes me recognize that I'm in a dream, at which point I often awake.
It is also odd how a dream can incorporate something happening in the real world, alter it, and add it to the dream. Several times when I was really tired, the alarm would go off... but in my dream, it was heard as a bell ringing or a machine operating. An annoyed DW had to shake me awake.
Because I've almost always had lucid dreams, I've seldom had nightmares. But once I died in my dreams 3 times in the same night! All were very vivid. Once in a car driving over a cliff, feeling the weightlessness of falling, and seeing street lights below... once hearing DW scream, just as a huge boulder crashed through our window... and once being in a standoff with an armed intruder, turning my head when I heard a scream, and finding myself on the ground with my ears ringing. Waking after the third dream with my heart pounding, I gave up, got up, and made coffee. That was 1980, and I still recall those dreams clearly.
I remember a lot of my dreams & could talk about them at length (in fact, think I already did

) but probably should try dreaming some new ones right now.