The Starks are a grim people. It's in the name. Their house words are depressing even.

It was the preferred method, they believed keeping the bloodline pure was integral to their control of the dragons.

Jaime is the valonqar.

Targaryans have had multiple wives in the past. My theory is Rhaegar and Lyanna were married at the tourney at Harranhal after he hunted her down as the Knight of the Laughing tree, and when he named her Queen of Love and Beauty he was being literal. Elia knew he needed a third head for the dragon but was too weak…

I'm pretty sure Jorah and Daario spread whatever accelerant was used to burn the khals as well as murder the guards.

Didn't hit Dany badly.