Resimde iki adam var. Soldaki yaşlı bir adam, sağdaki genç bir adam. Yaşlı adamın bıyığı var, genç adamın ise yok. Bu yüzden genç adam yaşlı adama "Bıyık senin mi?" diye sormuş. Yaşlı adam da "Hayır, benim değil, sen benim bıyığımı mı soruyorsun?" diye karşılık vermiş. The joke is based on the fact that the younger man is asking if the older man's mustache is his own, implying that he is not sure if the mustache belongs to him or if he has just grown his own. The older man responds by saying that the mustache is not his, meaning that he is not the owner of the mustache, but rather that the younger man is mistaken and is asking about something that is not his. This creates a humorous situation where the older man is suggesting that the younger man has a mustache and is asking a question about it, which is not the case. The joke plays on the ambiguity of the phrase "bıyık senin mi?", which can be interpreted in two ways.