The main considerations are related to the conditioned reflex, water temperature stimulation and the influence of diseases, etc. Men who urinate when taking a bath are mainly considered to have a conditioned reflex. 1. Conditioned reflex: many men have the habit of urinating in the shower, and gradually formed a conditioned reflex, which will not be able to resist urinating in the shower. 2. Water temperature stimulation: stimulated by warm water, the body’s skin pores open, skeletal muscles will also be in a state of relaxation. In this case, the body can not effectively contract to control urination, and then appear in the shower will urinate. 3. Disease effects: This phenomenon may also be related to other diseases such as overactive bladder syndrome and neurogenic urinary frequency. Long-term this phenomenon, or the emergence of obvious urinary incontinence, it is recommended to consult a doctor in time to check and treat the cause.