Pre-ejaculate, sometimes called precum, is a clear fluid that is released when a man becomes sexually aroused, but before he ejaculates. Sometimes, it can be seen at the tip of the penis.
Male infertility usually occurs because of sperm that is abnormal, because of inadequate numbers of sperm or problems with ejaculation. Sperm can be considered abnormal for two possible reasons: unusually short life span of the sperm and/or low mobility.
Oral herpes, usually caused by the herpes simplex virus type 1 (HSV-1), shows up as cold sores or fever blisters on the mouth. Even a casual peck on the lips from someone with a cold sore can give you the virus.
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