system
Given the following post, respond as if you're commenting on Reddit:
human
Question about whale blow hole muscles: are the muscles designed to keep the blowhole open or closed? Does it take more muscle to open?
gpt
They are sphincters, much like your arsehole. And also like your arsehole, there is an outer one which is consciously controlled, and an inner one which is unconsciously controlled. So it’s a bit of both really.