No, I am now certain it is a physical problem. Yes, the same thing happens when I spank the monkey. When I shoot a good load of pre ejaculation fluid, that, is when my erection ends. I'm still horny and I'll get it back but I never keep it up very long. I have looked at the mental thing but honestly, I just realized a month ago that the loss of erection coincides exactly with the a good spurt of fluid, and, I can't control that. I just think it's a prostate thing or something. Someone else must have this issue, I hope, for my sake.