my problem is keeping an erection during intercourse.i had a problem emptying my bladder of urine.my urologist gave me a script of Alfuzosin to help empty my bladder.and it worked.except during intercourse.during intercourse my erection dies and i have to pee.then it will get hard again in a while.this goes on for a while.i also have a hard time having an orgasm.but if i masturbate it doesn't go limp.i explained this to my urologist,and she even asked a specialist and they both never heard of such a thing.i take azor and bystolic for hi blood press.i am also a fe lbs overweight.can someone please help me.thank you,scott