Dear Sir, I got married 3 months before, one night I felt erection and also an urge to go to toilet. After coming from toilet I tried to do sex with my wife, but I didn’t get full erection. I tried twice but failed. I want to know that is it normal? Otherwise our sexual life is good, but I’m very confused that what happened that day..?

This is absolutely normal. You may lose erection sometimes without any reason. Do not give second thought to it and increase your anxiety, which in turn can cause performance anxiety and erectile dysfunction. Forget it and enjoy your sexual life.