Itachi Uchiha And Sasuke Uchiha Forehead : He later became an international criminal after murdering his entire clan, sparing only his younger brother, sasuke.

Sasuke uchiha is one of the most popular naruto characters of all time (in the popularity polls, he's one of just four characters to rank in the top ten every when sasuke was very young, itachi would often poke his forehead, kind of as an affectionate way of teasing him;