Fast and weak ejaculation should first be considered as a cause of too much recent sexual intercourse and too many ejaculations. If you rest for a while, it will improve significantly and there is no need to worry too much. It may also be related to recent overwork and psychological stress. Certain diseases, such as prostatitis and prostate enlargement, can also cause faster ejaculation and weak ejaculation when the enlarged prostate presses on the ejaculatory ducts, which can be clarified by ultrasound and routine prostate examinations.