Dog fighting as an act that exists in this world is discussed in book 1 and book 3. I cannot remember if it is explicitly mentioned in this particular book between those two.
Borderline weird scene that is briefly mentioned where someone has sex while possessed and neither the holder of the body or the person they are having sex with realised what was actually happening.
The burial in question does not happen “on screen”. The author states that the buried person only appeared dead and the life signs were rendered undetectable (as in Romeo and Juliet).