We can tell what is a joke and what is malicious. When you feel that people around you are spitting at you in a joking manner, if his spitting makes you feel that there is no such serious problem, you can appropriately black yourself. If his jokes don't make you particularly happy, you can actually remind yourself where the bottom line is.
Because jokes are the first thing that makes another person happy. If this joke is malicious, then we have an obligation to keep some dignity for ourselves.