Why do guys suddenly go limp sometimes? ?!

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Performance anxiety is the most common cause of losing or not getting an erection. It is the result of being in your head worrying about whether or not you will get hard or stay hard. Once you start to do that you get caught in a "fear of failure" cycle which keeps reinforcing itself. How to deal with this problem is explained in simple terms in a small inexpensive book on premature ejaculation.

There are a lot of high-priced programs advertised online but all you need is this inexpensive little book written by a doctor and sex therapist that has been used successfully for more than 32 years.

It is called "Lasting Longer: The Treatment Program for Premature Ejaculation" by Dr. Sy Silverberg M.D. For more information just enter the doctor’s name in any search engine: Dr. Sy Silverberg M.D.

Nervous is probably the main reason. If they are turned off or drinking they have trouble getting hard in the first place.

Now if it seems to happen to your guys specifically, I don't want to place blame, but maybe it is actually something you say or do.