Unless you ask him to do this or in a relationship with him he is being rude and crude. A boy can't just come along and do this and it is considered sexual assault. If a boy you know is trying this tell your parents or a teacher.
While deeply kissing her, just let your hand go there in a gentle circular motion. Good Luck!
Tell him to back off.
Simple. Put your hand in the same place on her.
Something like a slappy hand?
Just stick your hand down her pants and then lick her nipples
Bend your head forward and run your hand down your neck. One vertebra sticks out more than the rest. That is the base of your neck.
boys; you put your hand on your erect penis & pull up & down;) girls; put a finger into your vagina & push up & down. SIMPLE.
you kiss the girls hand
A player can have two sticks in his possession but he can not play the puck while holding both.
I see girls do it more often. I've been told that it means "Let's have sex"
Girls do hand practice.
It is inappropriate and violating without consent. The girl's feelings and boundaries should be respected at all times.