It's nice to take people  along on your traveling plans.
John is looking through a travel book with his girlfriend when he decides he wants to travel.
John wants to take a trip to Paris.
John asks his girlfriend to join him on an exciting trip to Paris, which she does.
John travels to Paris by himself telling his girlfriend he wants to have a personal adventure.
John's girlfriend has a great time traveling with him and feels closer to him as a result of the trip.
John's girlfriend feels insulted that John doesn't want her to join him and considers ending the relationship.