I cynics explanation:I don't understand their obsession with pixel animation, there is very little arousing about looking down on small low definition people having sex.
And worst of all it just makes me think of what could be, a proper sex scene with a mermaid guard or nurse could be very gratifying.
I swear it's like the pixels mock me
1: Developer doesn't pay for it (thanks King for putting in the time)
2: Developer doesn't need to really come up with any story elements for it, so it saves time too.
3: Dev can pad the changelog so it looks like the game is still worth supporting.
4: Dev doesn't need to fix any issues with artists not being on time/bad artstyle and so on.
5: Did I mention the dev doesn't pay for it?