Hi, Chikowa! Don’t go through life spacing out(笑)
To get straight to the point, the standard diameter of a turd is around 3–4 cm. It’s roughly 16 cm long and weighs about 100–150 g. If you weigh yourself before and after using the toilet, you can measure the weight of the poop you just passed. Incidentally, the standard size of a turd is an important reference figure in the toilet industry. Things like toilets’ flushing capacity and the diameter of sewer pipes are designed around figures like these. Every now and then, though, an oversized one comes along and won’t flush. Apparently, people with dementia are more likely to produce out-of-spec specimens, so care facilities supposedly have to conduct regular “big game hunts.”
As for the “dick” you’re curious about, the Japanese average is apparently 3.5 cm in diameter at the glans and 3.2 cm along the shaft. Most seem to fall within roughly ±20% of that. About the same thickness as a turd. So it can fit in a butt, after all. Then again, an inch (issun) is 3 cm, so maybe that’s roughly the basic unit of human dimensions.
There’s a famous story about men getting turned on when a woman says, “Mine is about the size of the hole in a chikuwa.” But women whose chikuwa-sized opening can only accommodate one finger really do exist, and unless you take your time, go slowly, make it feel good, and help her relax, it can hurt. Sometimes it suddenly becomes much more relaxed after she climaxes, but even if it doesn’t get that far, the key is to be careful and help her loosen up. Once fully relaxed, the human body can stretch surprisingly far. They say that if your jaw is completely dislocated, it can stretch down to around your chest—and that opening can accommodate an entire human being during childbirth, after all.
As an aside, there’s the Chihuahua, whose name sounds a bit like chikuwa and which women love. Apparently, even small Chihuahuas stand about 13 cm tall, which happens to match the average length of a Japanese man’s penis. It’s easy to see why they’re popular. And while we’re at it, the iPhone SE is also in the 13-cm range in length—13.8 cm. A typical ballpoint pen and the diameter of a CD are also around 13 cm. Everyone’s clearly aiming for the same number. Why not stop being shy and just call 13 cm “one dick”?
So, questioner, please make sure to ask an actual question. Even after writing this much trivia, it’ll probably be deleted by tomorrow morning(笑)
Taro