Hi there...I can understand your concern. But how is that related to cancer. You might have had an erection earlier and not realised. It can happen when you are asleep also. At that time the ejaculation might not have been completed. And it would have got completed ejaculate when to went to pass urine. If you have any further queries kindly consult a general surgeon.
Answered2016-06-27 11:51:13
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