1 Work by FiveTail in Fallout: New Vegas
Yes Man has been working on a project: constructing a virtual reality version of pre-war Vegas based on any clues and holotape videos he can find. He just wants the Courier to enjoy herself. And, well, maybe getting to project his consciousness into a human vessel in order to observe it all is something he'd enjoy too.
Fluff in Chapter 1, smut in Chapter 2. Ad-libbed resolution in Chapter 3.