Vriska says that they’re in some quadrant together. And Dave says he “gets” the quadrants but has never had a reason to put that knowledge into practice so that kinda excludes all quadrants outside the one most similar to the human relationship. 

Get high?? I dunno

Act 5 Act 2, later confirmed when Erisol is talking to Fefeta

Act 5 Act 1, Kanaya had flushed feelings for her and broke off their moiralligence when she saw her kiss Tavros

Ships that have been canon:
(Vriska) ♥ Doomed John
Dave ♥ Terezi
Terezi ♠ Gamzee
Vriska ♠ Eridan
Eridan ♦ Feferi
Equius ♥ /♠ Aradiabot
Dirk ♥ Jake
Jade ♥ Davesprite
Kurloz ♥ Meulin
Karkat ♦ Gamzee
Rufioh ♥ Damara
Vriska ♦ Kanaya
Aranea ♥ Porrim
Sollux ♥ Feferi
(Vriska) ♥ Meenah
Snowman ♠ Spades Slick  
Spades Slick ♥ Ms.Paint
Dad Egbert  ♥ Mom Lalonde

Ships that are Endgame canon:
Rose ♥ Kanaya
Terezi ♦ Vriska
Kurloz ♦ Mituna  ♥ Latula
Meulin ♦ Horuss ♥ Rufioh (albeit about to break up)
Dave ♥ Karkat
Equius ♦ Nepeta

Bolded means they happen exclusively Pre-Retcon

I spent too much time trying to find a definition and figure out what you’re talking about.  But it’s actually just two words mushed together.

Dote: be extremely and uncritically fond of.

Smite: to strike with a firm blow

Basically Dad was being very firm with his affections and offerings of cake which only infuriated John further

It seems like it. Which makes sense since Light is Knowledge and Luck

That too

It’s a Quest Bed. You can’t die on it to ascend tho. A person’s dreamself is teleported to their Battlefield Quest Bed when they die on their Planet Quest Bed.  This is why the Alpha kids had to die using their Slabs

She asked the All Knowing Cueball if the Horrorterrors were evil and they responded by giving her a shit ton of power