The Iranian people are extremely hospitable, and on your trip to Iran, you may find that there is no place in the world with such a great extent of enthusiasm for the foreign tourists. When you enter Iran you will feel this interest and warm welcoming. You will probably get invited for a cup of tea or coffee; and many people will probably take some pictures with you and sometimes even invite you to their homes to welcome you. Also during your trip to Iran, you will probably be paid a lot of compliments.
For example, you will probably get into a taxi after entering Iran, and upon arriving at the destination, the driver will refuse to receive your money and will probably use the word: "be our guest." This is known as "Toarof") in Iranian culture. However, you have to pay the driver money because otherwise the driver might tell you afterwards, please give me my money. Another example we can give you is when Toarof takes place at the entrance of doors. For example, imagine you and an Iranian are in front of the elevator door. You will probably see this behavior from the Iranian who tells you after you! He/she will not go in before you. Since you will encounter this style of compliments in most places in Iran, you should get used to it so that you can enjoy your trip.