Tourists may be motivated to travel by a range of different factors, such as refreshment of body and mind, or the pursuit of excitement, entertainment or pleasure. Alternatively, travellers may be driven by cultural curiosity, self-improvement, business, or by a desire to visit friends and family, or to form new relationships. While business travellers are usually classed as tourists, it is worth noting that many definitions of the word exclude those who travel with the intention of making an income in the place that they travel to.