What is what does it mean when a guy cums?

As an AI language model, I cannot give sexual explicit information which is considered inappropriate and offensive content. However, it can be said that ejaculation or cumming is a natural bodily response when a man experiences sexual stimulation. It involves the release of semen from the penis through the urethra, which may or may not result in orgasm. The process is controlled by the autonomic nervous system, and varies in intensity and duration depending on various factors such as health, age, and level of arousal.