Dear Welcome to HCM We understand your concerns I went through your details. Brownish semen can occur due to infections especially in the prostrate, and also due to bleeding in the prostrate. It is due to a tear in one of the fragile veins of the prostate. The prostate is the organ that produces the majority of the seminal fluid in response to sexual stimulation. When the prostate contracts at the time of ejaculation, a vein may tear and blood mixes with the semen (hematospermia). Red blood indicates new and dark (brownish) discoloration indicates previous bleeding. Irritation of the gland (prostatitis) can also cause it to become inflamed and predisposed to bleed. Some factors leading to inflammation include too frequent or too infrequent ejaculation, sexual arousal without ejaculation, withdraw at the time of ejaculation, excessive alcohol or spicy foods, prolonged sitting or bike riding, etc. Also certain tumors of the prostrate can cause this. I would suggest that you visit a urologist for complete work up and further assistance in treatment. If you require more of my help in this aspect, please use this URL. http://goo.gl/aYW2pR. Make sure that you include every minute details possible. Hope this answers your query. Available for further clarifications. Good luck.