It was a onetime trap. Itachi sealed a single use of Amaterasu inside Sasuke to protect him which unsealed the moment he saw Obito's Sharingan as programmed. A last ditch effort to kill him, as Obito said. We even see Sasuke's Sharingan morph into MS an image of Itachi's Mangekyou sort of appears.
Sasuke never lost his left eye during his battle with Itachi. Sasuke never lost his left eye during his battle with Itachi. He was trapped inside Itachi's Tsukoyomi, where Itachi manipulated space and time to give Sasuke the feeling that his eyes were being ripped off.
It's something he always did to apologize to Sasuke because he didn't have enough time for him. It's also a sign of love for both Itachi and Sasuke. So when he touched Sasuke's head before he died it was his way of telling he loved him after everything.
The forehead poke was Itachi's way of showing love to Sasuke even though he couldn't be with him, and a way of asking for forgiveness for this. That's why Itachi gives him that last forehead poke before he dies, to apologize for what he's put Sasuke through.
It's eventually revealed that Itachi didn't murder his clan in cold blood. This was done to prevent another world war between the villages, which Itachi was afraid of. After killing his clan, he was allowed to spare his brother Sasuke, hoping that the hatred and trauma from the event would mold him into a strong ninja.
Locking a text message marks the message to prevent it from being deleted. There are still ways to delete locked text messages, the Lock feature just adds an extra layer of security to prevent accidental deletion.
It just means successfully getting to know and dating someone you find attractive. You usually start by “chatting up”. If that is successful, then you have “pulled”. Well it means going out clubbing or to the pub to find a girl, usually just a one night stand to sleep with.