Ever wonder why sticking your finger in your belly button makes you want to spend a penny?

你有没有想过为啥用手抠肚脐眼会让你想上厕所？

If you don't know what we're talking about, you should lift up your shirt in the name of scientific adventure and have a good poke¹ around in your belly button.

如果你不知道我们在说什么，那就撩起衬衫，然后好好地以科学探索之名来抠抠肚脐眼。

Don't just fanny about around the sides as you've got to get right in there to feel the tingle².

不要只是做表面功夫要抠里面直到感觉有点刺痛。

Done it? Now tell us how it makes you feel.

结束了么？来告诉你什么感觉。

Hello - you still there?

你好-你还在么？

Conveniently though, your little loo break just proved a medial point - that sticking your finger in your belly button makes you feel like you need to have an Ali G.

抠起来很方便的肚脐眼实则是你身体的中间点，用你的手抠它会让你想去厕所。

Dr. Christopher Hollingsworth of NYC Surgical³ Associates puts it all down to the fact that the sensory⁴ nerve fibres of your parietal peritoneum - that’s the internal lining⁵ of your stomach cavity - relay information back to the spine⁶ in the exact same area as those of your bladder and urethra. Your brain then interprets that as discomfort⁷ in your urinary bladder and goes, “Ooh, I need the lav. RIGHT. NOW.”

纽约外科协会的Christopher Hollingsworth 表示，当你动手抠肚脐时，会刺激到腹膜感觉神经，也就是的胃部内腔，接着脊随会向膀胱和尿道传递“想尿尿”的信息给大脑。