Hyperspermia is a condition where a male produces an abnormally large amount of semen or ejaculate volume. This is the opposite of Hypospermia, where a male has a reduced, or unusually low semen volume.
Though Hyperspermia is a rare medical condition, it's possible to reach hyperspermia levels of ejaculation through natural methods, and achieve the above-average levels of semen volume, which is generally considered to not be over 5ml of ejaculate fluid (1).
Hyperspermia isn't necessarily a medical condition that warrants concern in most cases. For this reason, it's rarely diagnosed. There are very few studies on hyperspermia, but those that exist classify hyperspermia as a male that ejaculates more than 5.5ml of semen. Some studies have this lower level as high as 6.3ml of semen. From that study:
"The seminal volumes of 4223 men with known periods of abstinence of ejaculation, complete collections and with no dysfunction known to affect production of accessory gland secretions have been examined to define a minimum value for hyperspermia. The 95th percentile of the skewed data distribution was 6.3 ml and of the 229 men with values equal to or greater than this, 113 (49.3%) had sperm concentrations below the World Health Organization accepted minimum 'normal' value of 20 x 10(6)/ml. Basic seminal parameters should not be forgotten when assessing infertile men."
A 2013 study on hyperspermia noted that less than 4% of men can be classified as having hyperspermia (2).
The causes of hyperspermia are mostly genetic, but there are some things a male can do to potentially reach the levels of semen volume that could be considered hyperspermia.
As semen is mostly water, being hydrated is the #1 factor that could play a role in inducing hyperspermia. Without proper hydration, your body will not have the water it needs to produce enough semen.
Aside from hydration, there are supplements and nutrients that are known to increase semen volume and sperm health. These four are the most widely used and scientifically proven to increase cum from ejaculation:
There are other nutrients that have anecdotal claims to increasing cum loads, like Vitamin E, but these lack supporting scientific evidence.
Hypospermia is the opposite of hyperspermia, which means that a male is producing much lower than average amounts of ejaculate fluid. While this doesn't necessarily mean that a male with hypospermia would have a lower sperm count, it's much more likely that a male with hypospermia would have a lower sperm count than an average male.
If your goal is to increase your sperm count, a good place to start would be analyzing why your semen volume may be lower than average.
From the 2013 study mentioned above:
"In more than 90% of cases male infertility is due to either low sperm count or poor semen quality or combination of the two. Recent data confirm the decline in semen quality and quantity all over the world probably due to increased prevalence of sexually transmitted diseases (STDs) and urogenital infections."
As stated above, there are a few nutritional supplements that could increase semen volume to levels that could be considered hyperspermia. Those nutrients aside, any medications that have an effect on the prostate, testicles, or male hormones could effect the amount of ejaculate fluid produced when cumming.
Some examples include, antidepressants, hormone based therapy, like testosterone (TRT), and drugs that target the prostate.
An increasingly popular pornography category is hyperspermia. Like many porn-related things on the internet, the increased cum loads you see in these videos are often faked using homemade semen substitutes, or a fake penis altogether. If you're seeing massive ejaculations in porn, some are real, massive loads, but know that they're not all real.