>tl;dr
Does anyone here have experience with blood in their semen? What was the cause in your case? How did you deal with it?

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I jacked off this afternoon and my first load had a brown color to it. I shot 3 more loads after it and they were all white as they should be.

What the everloving fuck was that?

I'm 27, ideal BMI, no conditions, not undergoing any treatment, I don't smoke, don't do drugs, still a virgin so it's definitely not an STD unless a burglar ninja hooker rode my dick tonight when I was asleep. I'm pretty sedentary (albeit not completely, I make sure to take at least a 30 minute to an hour walk every day) but other than that I'm a pretty healthy guy.
I don't jack off a whole lot, maybe like once a week, but when I do I shoot multiple loads, like 3 per session.
The strangest part is that it didn't even hurt when I coomed the brown load, I did a little research and the search results allege that it's probably blood. I'm sure I don't have a urinary tract infection because I'm not leaking piss and my dickhole doesn't stink, so that leaves the cancer possibility. Do I have dick cancer now? What the shit