Hi I have an 8 year old son and a few weeks ago I saw him pulling at his penis often either when he is walking or sitting or standing, I asked him why he kept doing that he said that it is weak!! I said in what way,he said like when you weak from being sick that kind of weak,and tonight I asked if when he urinates if it gets hard he said no,I use to see erection when he wants to use the bathroom but for a while I did not, I am concerned can you help???