Yes, men do have sperm. In fact, women do not have sperm at all.
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Some men may be impotent, usually a result of having a low sperm count.
No, old men do not have worms in their sperm. Sperm will be healthy even when a person is not.
No, the semen and sperm is the same for all men. What can change it is your diet.
Women don't have sperm.
Men produce sperm for the purpose of reproducing.
According to David Hormander in Harvard medical studies men with clear sperm can never have a child. If they do, for some reason the child will be born with some sort of autism.
Ew. And no. I assume by 'men sperm' you mean human ejaculate. That is disgusting.
Its called premature sperm. Its when a man releases sperm earlier than the woman during sexual intercourse.
Some men experience that sperm self ejaculates usually whilst sleeping. The rest is absorbed into the system and removed. Sperm is being produced and renewed constantly.
No. Only men produce sperm.
Most Men can and do produce sperm all their life, Unlike women, men produce live sperm continuously throughout their life. As they age, the ability to get an erection may impeded their ability to deliver it, and new research shows that it is not as lively & vigorous as men age, but most men produce sperm from Puberty throughout their lifetime.