To make the description more "sufficient", this is a response to a private challenge.
The goal of challenge - "write a clopfic featuring anthro ponies engaging in a sexual interaction which is a first for at least one of them".

As such, this story will consist of several chapters, each of which will describe a separate case, an all of them will be tied into loosely consistent universe setup (As in, no chapters will provide directly contradictive information, and some of the background details may refer other chapters.)

Full summary as to why this exists is in foreword… So without further ado - onwards.