Im 27. I started masturbation from the age of 19. Now it is on & off. Yesterday I had a sex with someone. During sex i feel that I got erection in my penis but it was not very tight. U can say that it was a soft penile erection. Although i completed my intercourse successfully. but im very worried about that. I asked 1 of my friend about that whether it is a disease or not? But he was making fun of me. So Im writting this to u. Please help me out from this problem. Im verry worried about that. From the last feww days i was also feeling that i was also getting soft erection in my penis during sleep. Is it some sexual disease or not. In 2013 im going to marry. So i wanna make myself sexually fit. Please answer my question soon. Thank U very much.