You might want to put some clothes on' suggested Jace 'I'm all for the bra and panties look, but you don't want the Silent Brothers to die of excitement

Then you're aping him. Valentine was one of the most arrogant and disrespectful men I've ever met. I suppose he brought you up to be just like him."
"Yes," Jace said, unable to help himself, "I was trained to be an evil mastermind from a young age. Pulling the wings off flies, poisoning the earth's water supply — I was covering that stuff in kindergarten. I guess we're all just lucky my father faked his own death before he got to the raping and pillaging part of my education, or no one would be safe.

It means 'Shadowhunters: Looking Better in Black Than the Widows of our Enemies Since 1234'.

I can only assume," said Jace, "that mortal emotions amuse you because you have none of your own.

Well, I’m not kissing the mundane," said Jace. "I’d rather stay down here and rot."
"Forever?" said Simon. "Forever’s an awfully long time."
Jace raised his eyebrows. "I knew it," he said. "You want to kiss me, don’t you?

Jesus!" Luke exclaimed.
"Actually, it's just me," said Simon. "Although I've been told the resemblance is startling.