sentence: Older men produce less semen.
sentences_before: Semen is known informally as 'cum', 'jism' or 'jizz'. Men ejaculate different amounts of semen. More semen tends to come out if a man has not ejaculated for many days, or if he has been stimulated for a long time.
sentences_after: If a man ejaculates an unusually small amount of semen, this is a medical condition called hypospermia.
concept_name: older man
headings: Ejaculation Men Semen
categories: Female reproductive system Male reproductive system