Why do I have so much sperm?

When I ejaculate wether it be from masturbation, or sex. I have well, a big load. Every women i've been with has commented on the amount. I get allot from masturbating, but even more from sex. I'm going to college, and I think I meet sperm donor height requirments so would me making so much sperm be good for that? Does it mean anything to have so much sperm? I'm not worried at all, i'm just curious.