Hey EBuzz!

Nothing to worry about, um I am not extremely sure about this if its the same for both men and women. But when you ejaculate your bladder is closed off. There is no way that both semen and urine can be mixed together.

This may sound very gross but it happens to a lot of men. When they pee they don't get it all off themselves! The whole shake it and leave thing is not enough at times. Also if you are uncircumcised it may also be a problem with the pee getting into the creases. Maybe that is what she is tasting and smelling. I have had the problem before with my boyfriend. Just make sure you pee, wash up then let her at it.

If this does not help it may be a change of diet that you have had in the past while a new medication you have started using. The stuff you put into your body has a big effect on your region down there.

I hope I helped!

Goodluck! (If none of this works then go see your doctor you MAY have a weak bladder and be letting urine out I am not completely sure)

Also, Maybe you should take some time away from down there until you have it figured out. You can do oral but I don't think having your girlfriend have urine in her mouth is too healthy.