Healthy semen is usually clear, white or grey and has the consistency of raw egg. Normal sperm is slightly alkaline, making it smell a bit like cleaning products containing bleach, chlorine or ammonia. Healthy sperm usually have a faint smell and stronger more unpleasant smells may be a sign of health problems. See your GP or health professional if your semen:  becomes strong-smelling smells fishy contains blood is coloured pink, red, brown, black, yellow or green  Or if you experience pain when ejaculating.