Yes, occasional nightfall (wet dreams) in adults is generally considered normal. It is a natural bodily process, and its occurrence alone does not imply sexual weakness or a medical condition. The frequency of nightfall varies from person to person. Factors such as stress, sexual thoughts, sleep patterns, and body constitution can play a role; therefore, the need for treatment cannot be determined solely based on how often it occurs.
However, if nightfall happens very frequently, or if you experience pain, a burning sensation, unusual discharge, other symptoms, or significant distress, it is advisable to consult a doctor for a proper evaluation.