Dylan's spending too much time in a hot tub, may be the reason for low sperm count.
In anisogamous modes of sexual reproduction, the male reproductive cell, or gamete, is called the sperm. Red algae and some fungi generate spermatia, which are immobile sperm cells, whereas animals create spermatozoa, which are flagellated, motile sperm cells.
Low sperm count can hamper reproduction, and it is attributed to many factors including hot water baths, tight underpants, etc.
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