Over the years, it's become apparent to us that B has a touch of colorblindness. For excample, our bedroom is painted a somewhat ugly greyish-brown. But he sees it as an incredibly ugly grey-green. We've had a number of arguments over the color of objects over the years, but it's become generally evident that I can see colors he cannot, so we don't really argue any more, because what's the point when we're seeing different things?
Interestingly, Katherine seems to have a touch of colorblindness as well. Her bedroom is a light tan, but she's been thrilled since we moved in because she sees it as pink. I can see how if you subtract some green, it would look pink. She definitely knows what green is, but apparently can't see all shades of it.
We started singing "Do-Re-Mi" last week (it had come up in conversation - we're not actually given to Sound of Music singalongs or spontaneously breaking into Julie Andrews medleys) and B initially got the order wrong, singing the "mi" line where "do" belonged.
So here's a fun exercise for you if you have a decent sense of pitch (unlike B, who is cheerfully tone-deaf): try to sing the lines of "Do-Re-Mi" in the wrong order. Because I couldn't do it. I associate each line with the note it starts on, and I can't sing a line if it starts on the wrong note. I think if I wrote it down and sang it while reading the lyrics I could do it, but I can't just rearrange the song mentally.
We used to live with a friend who is a supertaster. He has four times the normal number of taste buds, and is very sensitive to strong tastes because of it, particularly bitter. I developed quite a bit of sympathy for that problem during my first pregnancy, when my sense of taste suddenly became much more acute. Tomatoes, in particular, just became overwhelming. Conversely, when Katherine was a toddler, she would happily eat lemons without the slightest sign they might have a strong taste until the day she bit into one, made a face and never asked for one again. She couldn't taste sour until one day she could.
It's so fascinating, seeing what a natural variation there is in what we perceive. There are days I wonder if any of us truly see, hear or taste the same thing as anyone else.