Extra skin on the penis does not affect sperm development.
Producing sperm has nothing to do with your penis; that's all about the testicles.
sperm.
it carries sperm from the testes to the uretha which will then carry it out the penis.
No.
Yes. If the penis was not cleaned well after the last ejaculation. And pre-ejaculate can also contain sperm.
Yes, sperm leaves the male reproductive system through the penis. The urethra may carry sperm or urine.
Penis. No, it has no affect on it.
The penis. Usually when the man releases sexual tension (Sex, or masturbation).
Sperm is produced in the Testis. There are two tubes connected to the penis. If erction takes place the tube coming from the testis opens and sperm exits the body through penis.
The sperm complete their development in the epididymis.
lol...what?
sperm donor ? ?