Hi there, thanks for asking. Although it is sometimes used to enhance the sexual pleasure, it can cause transient erection problem. Fortunately, in most of the cases it improves quickly. The mechanism of action of this drug is to dilate the vessels including the vessels in the penis. The vascular system of the penis is sensitive, so it should be treated delicately. Many drugs have a specific dose depending on the weight and other factors a person has. Recreational drugs are not calculated on these aspects and are often problematic. There is no problem with the semen to be watery. It could be on sometimes in this way. Let me know if you have any other question. I wish you a good health.

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