yes
#1No, unless you count enamel erosion as a benefit.
There really aren't any since the amount of nourishment is so small and especially if you consider a ejaculation is about ½ a teaspoon.
Energy hit and the refreshing taste other then that it is killing you
Less mucus and for the lactose intolerant, less gas. Some say the isoflavones in soy help prevent breast cancer and prostate cancer.
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