When a man has an sperm has bad smell your urine stream is blocked, so that semen can pass through as the only discharge. It's Not You, It's Me. As Huffington Post reports, thongs can affect your vaginal health by transporting bacteria from your anus to your vagina or urethra. Semen in its normal form is usually a cloudy white-gray substance. Having a vagina is one hell of a responsibility. Advertising revenue supports our not-for-profit mission. Mens Health Sperm has bad smell Health. Although the exact reason that varicoceles cause infertility is unknown, it may be related to abnormal testicular temperature regulation.