We all mock each other (and about the colourful grandmother's shirts as well), only if others are brave enough to either answer something, or laugh at themselves with everyone, then this comrade perceives any harmless joke as an insult.

Do you all lack the mind just to stop slandering someone who doesn’t have a sense of humor? Well seriously, you are on the same wave, you have fun, and the comrade is offended. Well, hustle and joke on in your company, and communicate with him neutrally, is it so difficult?