It's impolite to use your friend's property without asking.
Ashley had bought a new bike and was showing it to her friend Mallory.
Mallory wants to use Ashley's bike.
Ashley complements Mallory on her new bike and asks if she can take a ride on it.
After Ashley goes back into her house, Mallory goes into the garage and takes the bike for a ride.
Mallory says yes and Ashley rides the bike down the road and back.
Ashley is stopped by the police after Mallory calls them to report the missing bike.