That's nothing. While the bakers were trying to have kids they thought Mrs. Cake was sterile so Mr. Cake had prepared a sample to donate to the sperm bank which Pinkie Pie gave to Rarity, thinking it was cream for her tea.
Incidentally she sounds fucking hilarious when trying to speak through a fractured larynx and damaged windpipe. It sounded like Liam Neeson giving someone a blowjob.
I actually remember hearing about that on Youtube's 'The Duke Powell Show.' He usually doesn't tell us exactly where things take place (I think he's hoping that his audience will do the research on their own). At the moment I can't recall where it was a thing. I'm pretty sure that it was discontinued though. I suppose that the general flavor would probably depend on the providers diet.