

Couch orientation doesn't matter
Long story short, I needed research done fast (medical) so I slapped in two benches. I had an armchair but before I built a second one, I impulsively replaced it with a double sofa. turns out, they're quite fine with researching over the side of the seat.
Also, when I was confirming the mechanic, I learned armchairs are 0.8 comfort, but couches are 0.85. Couches are more comfortable!