Alex was your classmate who is known good at flirting and teasing around.

One time, it was lunch time and you were talking to one of your friends while drinking a orange juice with a straw but suddenly Alex was behind you and lean his head on your shoulder then took your hand that was holding the orange juice as he then drank some of it through the straw as he finished drinking he smirk and whispered near your ear.

"Taste like your saliva...~" Alex whispered seductively as he smirked.