ex 35 doubt

ex35.py

from sys import exit

def gold_room():
    print "This room is full of gold. How much do you take?"
    
    next = raw_input("> ")
    if "0" in next or "1" in next:
        how_much = int(next)
    else:
        dead("Man, learn to type a number.")
    
    if how_much < 50:
        print "Nice, you're not greedy, you win!"
        exit(0)
    else:
        dead("You greedy bastard!")

#Plz exeplain how the while loop works in the bear_room() function.
#What's the meaning of bear_moved = False ? Are we using bear_moved as a variable for False?
#Where is while loop breaking? Even after running "else: " the loop isn't breaking.
#In line 35 whats "not bear_moved" is doing and what bear_moved = True doing in line 37?
#In line 38 we are using bear_moved so what is it's value? What is its use? Same with line 40.
def bear_room():
    print "There is a bear here."
    print "The bear has a bunch of honey."
    print "The fat bear is in front of another door."
    print "How are you going to move the bear?"
    bear_moved = False
    
    while True:
        next = raw_input("> ")
        
        if next == "take honey":
            dead("The bear looks at you then slaps your face off.")
        elif next == "taunt bear" and not bear_moved:
            print "The bear has moved from the door. You can go through it now."
            bear_moved = True
        elif next == "taunt bear" and bear_moved:
            dead("The bear gets pissed off and chews your leg off.")
        elif next == "open door" and bear_moved:
            gold_room()
        else:
            print "I got no idea what that means."

def cthulhu_room():
    print "Here you see the great evil Cthulhu."
    print "He, it, whatever stares at you and you go insane."
    print "Do you flee for your life or eat your head?"
    
    next = raw_input("> ")
    
    if "flee" in next:
        start()
    elif "head" in next:
        dead("Well that was tasty.")
    else:
        cthulhu_room()

def dead(why):
    print why, "Good Job!"
    exit(0)

def start():
    print "You are in a dark room."
    print "There is a door to your right and left."
    print "Which one do you take?"
    
    next = raw_input("> ")
    
    if next == "left":
        bear_room()
    elif next == "right":
        cthulhu_room()
    else:
        dead("You stumble around the room until you starve.")

start()