During the mandatory main mission "Going Rogue" a character is described as a master of disguise and 'traps'. Said character is initially depicted as an attractive woman before being revealed as a hulking brute of a man duping hapless foes for the slaughter.
Sexual assault on men is mentioned twice: both times in a male NPC's idle lines (as in, rare lines that trigger when talking or just being around the NPC). Both times it's framed as more or less a joke.
During the mandatory main mission "Going Rogue" a character is described as a master of disguise and 'traps'. Said character is initially depicted as an attractive woman before being revealed as a hulking brute of a man duping hapless foes for the slaughter.
One of the characters, Moxxi, is sexually objectified, although it is explained in-lore as her objectifying herself to bring more customers to her bar.
When you knock off the helmet of the Goliath enemy, a skull with dangling eyes and a grotesque, meaty neck comes out of the mouth of what used to be their head.
No show hanging during the main story, but mentions of hangings occur, and bandit infested areas (including ones visited during the main quest) possess hanging corpses as "decoration".
Enemies can lose limbs according to the shot that kills them. If their bodies are shot the bodies will also lose limbs in the same fashion. Multiple characters have prosthetic limbs. At the end of the Handsome Jackpot dlc a character has their hand cut off.
In the Krieg's Fantastic Fustercluck DLC, there's a mission where you go through a mental institution-like area, fighting off patients and looking through cells and medical theatres.
In the Krieg's Fantastic Fustercluck DLC, there is a segment of a mission where you try and stop someone from receiving shock therapy but ultimately fail. The therapy is portrayed as a bad thing.
A lot of character (friends and foes) die, including LGBT characters. One concrete example is a late game optional quest that involves the death of a lesbian character.