but I do recall the 4th option and the 2-seater, outside, -20°F

Ah, but we aren't hardy people, here in the South Pacific, PaulMy! I take it that the seats are not warmed?

Just following on from what has been said above- by TonyC.  Very important to have sufficient toilets in a home. In fact you probably cannot have enough of them.

Side-by-side large and small, suitable for all! 

First of all I thought this was a debate about an infinitely long personal hygene product ... I'm disappointed.

The Romans of course used sponges, and had toilet blocks (latrines) where both sexes socialised and passed gossip. (amongst other things)

I don't think that's the same as passing a motion through parliament, but the way things are at the moment ....

The reference to Parliament is probably appropriate. At some stage, didn't the Speaker have his own chamber pot nearby his Chair? Or is that an apocryphal tale? And to bring it back to the original topic, when modern toilet paper became available, did the Speaker have it hanging in, or out?

... when modern toilet paper became available, did the Speaker have it hanging in, or out?
The Speaker may not take part nor unfairly affect the outcome, but is there to ensure motions are passed in an orderly fashion.

If by 'out' you mean nearest the player, then that is the beteljuice regime. The main crapper (Named after Thomas Crapper) is co-located with a bath, so 'In' with condensation makes sticking to the tiled wall a real possibility.
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Plus the risk of bacteria etc coming off the walls onto the paper....it is a slippery slope.