After I pee, I have a sensation that there is some urine left in my penis. I always feel this. Even though I have no problem urinating, neither my urine smells foul nor it is cloudy but even then I feel that there is some urine left inside my penis (not my stomach), is it normal? Should I worry? I do not have any leak. Moreover when I am busy and not paying attention, this sensation goes away. Is it due to anxiety? What should I do?