By not smoking, drinking, not doing drugs and not drinking/eating caffeine products. studies show that when not doing the top followings you will produce healthy sperm.
Semen can be any color ranging from white, cream, opaque to clear, depending on the guy, the day, his diet and many many other factors. Just because your semen is white one day and clear the next...
Usually sperm appears to be a cloudy colour and has a chlorine smell to it. That is generally considered healthy but the real test is measuring your sperm count. If your sperm has a prominent change...