This paper presents the economic and sociological impacts of the relationship between tourists and hosts, with a review of relevant research. Firstly the economic importance of tourism is pointed out followed with a framework for understanding the basics of tourism. Definitions and typologies of tourism, tourists and hosts are only an introduction to explaining the economic importance of tourism. What every economy wants to achieve is a multiplier effect in tourism. However, in addition to all the positive effects, tourism also has negative effects, both economic and social and environmental. Furthermore, the paper discusses the relationship between tourists and hosts that is realized in the temporal and spatial context with the communication and cultural component. The relationship has different effects on tourists and on hosts, especially in the area of culture. One of the influences on host culture is the demonstration effect which is not necessarily negative. As well as the application of stereotypes in some cases is justified, particularly positive stereotypes. However terrorist attacks and pandemics are absolutely not justified. Nor is their impact on tourism, tourists and hosts, and the relationship between tourist and host. An example of the impact of terrorism is shown in the tourist destination of Paris, while an example of a pandemic is the impact of the COVID-19 virus on global tourism.