The composition of semen will amaze you. it contains very modest quantities of the following substances: aboutonia, ascorbic acid, blood-group antigens, calcium, chlorine, cholesterol, choline, citric acid, creatine, deoxyribonucleic acid, fructose, glutathione, hyaluronidase, inositol, lactic acid, magnesium, nitrogen, phosphorus, potassium, purine, pyrimidine, pyruvic acid, sodium, sorbitol, spermidine, spermine, urea, uric acid, vitamin B12, and zinc.
hormones, like testosterone, are substances secreted into the bloodstream which travel to the brain and cause things to happen in the body - like hair growth, sperm production, etc. testosterone goes from the testes to the bloodstream to the brain.... it is not excreted in ejaculate.
does that explain it?