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All About Erections

Diagrams: Male External Organs

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You probably know dozens of slang words for the penis ... but how much do you really know about this important part of a guy's body? Take the quiz and find out for yourself!


1.  How long are most adult erect penises?
a) between one and three inches
b) between three and five inches
c) between five and seven inches
d) between seven and nine inches
Am I right?


2.  How much semen is usually released in an ejaculation?
a) less than a teaspoon
b) between a teaspoon and a tablespoon
c) one cup
d) one gallon
Am I right?


3.  Penis size can only be permanently changed by which of the following?
a) penis pumps
b) vitamin shakes
c) plastic surgery
d) exercise
Am I right?


4.  What percentage of American boys are circumcised at birth?
a) 40 percent
b) 50 percent
c) 60 percent
d) 70 percent
Am I right?


5.  Approximately how many calories are there in a tablespoon of semen?
a) 6
b) 60
c) 600
d) 6,000
Am I right?


6.  What causes an erection?
a) a rush of water to the penis
b) a rush of blood to the penis
c) a rush of air to the penis
d) the penile muscle grows
Am I right?


7.  Why do guys' testes hang unevenly?
a) one testicle is heavier than the other
b) for protection
c) it looks better that way
d) so guys can pee standing up
Am I right?


8.  An average pair of testicles can produce 150 million sperm in
a) one hour
b) one day
c) one week
d) one year
Am I right?


9.  What is necessary for sperm to be made?
a) a certain amount of light
b) a certain time of day
c) a certain pressure
d) a certain temperature
Am I right?


10.  What is blue balls?
a) when a guy's testicles turn blue
b) when a guy feels some discomfort in his testicles
c) when a guy's testicles shrivel up
d) when a guy's testicles get hard
Am I right?

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