sentences: the sperm production is prevented in male insects
docs: stroking_penis has effect_of_stimulating_ejaculation spermicidal_jelly is spermicide. spermicide is birth_control. spermicide is medicine. spermicidal_cream is spermicide. cock is male_chicken. sperm_production is biological_production. spermicide is contraceptive. male_animals has penis sperm is gamete.