full circle with the lip tissue

» Lips are weird. They're skin, but they're not normal skin.
« Yeah, true. They're half in your mouth and half on your face.
» Outside skin is all dry and lives on land, while the rest of your organ tissue basically lives under water.
« If outside skin is land creatures and inside tissue is underwater breathers, then lips are... amphibians.
» And amphibians are weird.