If you are young and in a sexualy arousing situation you penis may coninue to stay hard even after you have just ejaculated. As you get older this is less likely, especially if you are not in a sexually arousing situation but after a short "recovery period" your penis will usually become erect pretty quickly if it is stimulated.
No.
Go to the doctor...IMMEDIATELY!!!!!!!!!!!!!!!!
Penis length has nothing to do with getting a girl pregnant. Ejaculation is what occurs, releasing semen/sperm into the female's vagina. These sperm then fertilize the egg and the female becomes pregnant. A 2 inch penis can get a girl pregnant, as well as a 12" penis as long as he ejaculates.
Producing sperm has nothing to do with your penis; that's all about the testicles.
You'll know if you're releasing sperm if it feels a bid good down there
sperm.
No, the size of a penis is determined by genetics and testosterone levels during development, not by the amount of sperm wasted. Sperm cells are constantly replenished in the body, and ejaculation does not affect the size of 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).