yes something can be done

make him go to the doctor?

Semen can change in taste or smell from the foods he eats. Could that be it? Otherwise, it would also be an indication of an infection if it's really bad.

FYI- Never douche if you think you might have an infection. It could push the infection up farther/make it worse.

Semen can smell a variety of different ways. Anything from a really gross, dirty laundry odour, to a rather pleasant, fruity... almost *and ignore the pun* nutty smell. It can taste that way as well.

Meat eaters generally have smellier and less desirable tasting semen. Vegetarians don't.

Here's a tip that has worked for me and many of my friends: Get him to eat pineapple. Just a few slices a day and it makes a difference.

and definitely NOT asparagus. Yuck.

hahahahahahahahaha. Oh, god. Yuck, indeed.