I always find these discussions interesting in the fact that people are so good at misjudging such things as fluid volume. It has been said correctly in this thread that the normal is 1.5 cc to 5 cc. The average is 3 cc. Normal ranges usually include 2 standard deviations. The person who claims to "almost fill a shot glass" ( 1 ounce- 28 ml or cc) would be the equivalent of the person who claims to have a cock which is 5 times longer than 2 standard deviations above the mean. In other words why is it creadible to say you almost fill a shot glass but no one would consider your 4 foot dick anything less than rediculous?
