First, just to get it out of my system: not much off a surprise - I think we all assumed Bill Clinton was randy.
Now, to my point.
It seems like everyone focuses solely on the no single standalone thing. Hopefully not veering too far off-topic, but it may be useful to know that for some people, that formatting choice will put them off.
More importantly, the poster states something that is flatly untrue.
You do not need to play someone else's saves to play parts 2 & 3.
If you follow the directions correctly, it's not a problem to play your own saves. I have done so, on multiple playthroughs, with no difficulty whatsoever.
I won't endeavor to relate the directions here (I play on Android; there may be extra steps to consider on PC).
I know
Satou Pendragon has a detailed set of instructions in his sig. Perhaps, if it has not been done already,
MoonBox might want to copy them to the OP?