Dear Welcome to HCM We understand your concerns I went through your details. The liquid you are talking about while you have your erection is actually pre-ejaculation liquid. That is a natural process and the liquid is a lubrication for vaginal sexual inter course. You loose your erection after that liquid mainly because of your anxiety. You are worried that liquid is a problem and because of that negative knowledge looses erection as a result of anxiety. I suggest you there is nothing to worry. The clear transparent liquid is a lubricator and is quite normal with everyone. Don t be anxious. I also suggest psychological counseling for you. If you require more of my help in this aspect, please use this URL. http://goo.gl/aYW2pR. Make sure that you include every minute details possible. Hope this answers your query. Available for further clarifications. Good luck. Take care.