I think Makisupa means that his semen is too watery and translucent. He wants it to be thicker and therefore whiter. I don't know a solution to that problem though. I guess you'd need to increase your protein content in your diet and perhaps be less hydrated.
i also have watery, translucent semen . . (but there's lots of it and it shoots real far)
But I really wish my cum was real thick and bright white like I see in some porn. Anyone ever notice changes in the thickness and consistency of their cum? Maybe you might have ideas about what thickens things up?