how is gay porn going to alter your load 
Jacking off four times a day, one probably gets bored with the same old, same ol' porn mags or videos. Variety is the spice of life....especially when it comes to sex. This being the case, gay porn might just be the thing to spike one's interest. However, I doubt it can increase one's load.
Speaking of porn, don't be mislead by what you see in porn videos....like when a dude cums buckets. There are ways to make this appear to be the case even when the fellow really just came a normal amount.