Here's something:
Mum said that when we were kids we would switch off which of us was the more outgoing. Sometimes it was me. Sometimes it was my brother.
Here's something else:
One of the most annoying things, as a kid, was to be referred to as "the twins" as opposed to being referred to by name, as if something of no substance, twin-hood, was more interesting and substantial than either one of us. This kind of reference went on for a very long time. Also of curiosity was that I wasn't interesting to others all by myself, but when that other kid who looked like me was around, then suddenly I became of interest -- never mind that I hadn't changed in any way.
Another annoyance was this question: "Why don't you dress alike?" Or this statement, "You two should dress alike." Again, this seemed a strangeness on the part of those making such comments, as if they'd rather deal with their version of who I should be -- part of pair -- as opposed to the person I was.
In other words, sure, I had a twin (still do, in fact), but in those early years that seemed to me no different than anyone else having a brother. In fact, it also used to strike me as quite strange that people would claim not to be able to tell which of us was which. The differences seemed quiet apparent to me (and in fact have become greater with time).
Another strange notion that others kept having was that my brother and I should switch classes from time to time if, say, I were better at English and he at math, we could swap and thus capitalize upon each other's strengths. Along the same lines was the constantly expressed notion that we should similarly pull a fast one on our girlfriends. Ha, ha, wouldn't that be fun? Well, no. One doesn't abuse one's superpowers, after all.
Speaking of superpowers, another annoying thing about people's perception of this twin biz is that whole sympathetic reflex thing: if I pinch you, will the other one feel pain? Answer: No. You pinch me, you'll likely get pinched back so you can feel your own pain.
That said, here's a story: Brother was in a car wreck late one night whilst driving home with his fiancée. Flipped that car over and spun it around a few times. Both were wearing seat belts. No real harm done (except to the bouncing car, and one black couch, which had fallen off the back of a truck and into the middle of the road, without warning, right in front of them, which was the whole cause of the wreck*). Anyway ... I woke up. In the morning. Late. Had a strangely unsettled feeling. That's it. No
shazam! of sudden realization. No psychic impressions. (Maybe it was too many beans the night before.)
Now, having said all that, when I visit my sister in law and my brother for lunch or dinner, sis'n law often will sometimes offer a dish that I decline. When I do that, she'll invariably laugh and say, "That's what I thought. Your brother won't eat it, either." Conversely, she'll often say of other things, "If he'll eat it, I know you will."
Meanwhile, the two of them had a kid three years ago, a little girl, and for the longest time she'd look back and forth between us, my brother and I, when were all together, as if she wasn't sure which of us was which.
I guess maybe some things don't change, after all.
As to the fighting mentioned by others, yep, brother and I did that a lot as kids, rolling around in the grass, kicking and pummeling. Alarmed sis would often fetch the parents, afraid we were hurting each other. Nope. We'd just sit up with grass in our hair and mud on our faces and wonder what all the fuss was about.
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Public Service Announcement: Wear your frikkin seatbelts.