GM
I only learned of that a bit ago, can’t remember where but seemed legit
What’ll really bake your noodle is how birds breathe 
Discussion
Oh that's fuckin' cool! So effective at extracting oxygen more consistently!
Yeah, someone on here (sadly forget who) brought it to my attention a couple months ago. Has to do with the high demands on oxygen they have while flying. Has kind of an “always breathing in” effect I think (even in the exhale phase)
Yeah, that's so cool! More consistent rate of gas exchange.
imagine a women breathing through her vagina