I had a good sexual life and my penis also too hard and good stamina but one day my friend Hits on my penis so from that day I feels that my penis is not too hard which was earlier and also I feels that it not erect as earlier as it was previously and previously my penis erect even thinking of girls but now days that feeling doesn't arise or it doesn't erect sooner just like previously, I don't understand that even from one normally hit it can possibly or it just my illusion in my mind. Please reply with proper answer.