As for the photo? I just made the joke funny... because she's NOT closing her mouth... did I have to explain it?
Anyhow... it's all just a joke. Scientists have not created such a camera.
And besides... Japanese scientists? Why would they create such a camera? Japanese men are never home - always working late, drinking with co-workers and playing pachinko, or screwing around with their mistress. The mistress doesn't make with the yaketty-yak.
The joke seems funny to me because, well... I'm just having one of those days when the camera might have come in handy.