my fiance and i are worried a bit about his cum/ ejaculation smell and taste.

here it is, he was born with undescended testicals, and needed some structual surgery on the actual penis when he was born. we obviously are active, but i'm why does he smell and taste like urine? colud having undescended testicals cause this? can we fix this? can you suggest any tips we can do, or medical opions? do you think this will affect our ability of having children later on?