Yo, I guess size matters on it how easy it is to keep erection? I certainly didn't have this problem a year ago when I was still bit smaller but now I start getting semifloppy pretty easily without stimulation. It like, stays hard but gets softer. Is there any way to prevent this happening or some kind of physical practices I could do to prevent this getting any worse. Also I'm only 18 and I certainly don't think it's a general physical problem because I have never heard of anyone having erection problems at this age Well it's not that bad yet but I fear I might still keep growing (which I don't want to happen, I would like to be smaller) and that it might make the problem worse. I hope someone posts serious answers to this thread because I'm honestly bit worried.