Shootin' and dribblin' (and we're not talking basketball!)
Why is it that drinking water hours before you masturbate increases the volume of semen?
Good question. I think it's because your body becomes more hydrated overall, so any glands responsible for secreting a watery substance (such as those in the male reproductive system) are able to work more efficiently and have less trouble getting water from the bloodstream. If you're dehydrated, on the other hand, your body will want to conserve water, so these glands will not have as much water available, and you'll ejaculate less.
You said that semen sometimes contains traces of urine, and you also said that you can't contract any illnesses by eating your own semen.
But what about the traces of urine? Won't the urine give you an illness?
You wouldn't want to ingest a significant quantity of urine, but with the amount that may (or may not) be in a single ejaculate of semen – just a trace – it wouldn't be a problem to ingest. Urine is some 98% water anyway, so the amount of undesirable substances from urine that may end up in a couple teaspoons of semen is negligible.
You say you can eat your own semen but you shouldn't eat anyone else's.
Why is it then that you see women eating semen all the time?

