Sir i use to practice sex with one day gap and the alternate day i masterbate avg.2 times.it is about 8 to 10 yrs since i started masterbating. Now in last 6 days i am unable to erect completely.i mean softer erection through which i can not penetrate to the vagina of my partner. It happened 2 times. And 6 months before one time i felt it was complete erection but in middle of intercourse it reduced completely .is there any serious problem or what should i do now???