There is always pair, who loves like a basic thing. Everything else depends on it. If you are hold to you, so you never be cheat your partner. If you are in free relationship, it is normal and obviously it doesn´t matter to nobody, when you enjoy with other partner in different place than at home, may only for one night. It depends on, how you front to it. There are people, who have only one partner for all life and they love only this person and they cannot do anything else, but there are other people, who have lots of other ideas, maybe also vices and they are in a group of people, who will do everything for their enjoyment.
How it real is?
But practice is really different. There are some exceptions on the first side, but in the other hand there are people, who wouldn´t like to have a relationship. They can have it probably easier, but not in that they haven´t partner, but in that they can do everything, that´s good for them, along them. So it is not problem, when men go to erotic massage prague, which is made by naked and beautiful women, and nobody tells them anything, when you don´t have still partner, so you do not have anyone to tell it, in this is a magic, which is probably the best for these people.