I'm sure these have likely been posted before (didn't see any after quick search), but it's basically two pregnant bellies talking 
Lot of belly movement (pushing and sucking from the looks of it) to show expressions and speaking.
hxxps://www.youtube.com/watch?v=RxQAh8ud9Ag - English Translation
hxxps://www.youtube.com/watch?v=rkDBTmHBhUs - No Translation and some extra "sketches"
hxxps://www.youtube.com/watch?v=lO-ycLfhlOs - No Translation and again some extra "sketches"
Last 2 have different scenes respectively, but also has those from the first vid towards the end.
Lot of belly movement (pushing and sucking from the looks of it) to show expressions and speaking.
hxxps://www.youtube.com/watch?v=RxQAh8ud9Ag - English Translation
hxxps://www.youtube.com/watch?v=rkDBTmHBhUs - No Translation and some extra "sketches"
hxxps://www.youtube.com/watch?v=lO-ycLfhlOs - No Translation and again some extra "sketches"
Last 2 have different scenes respectively, but also has those from the first vid towards the end.
