Sperm usually has an odor after air-drying. Under normal circumstances sperm itself is odorous and will have a faint fishy odor. This particular fishy odor is mainly produced by the prostate fluid and is a normal phenomenon. The sperm will still have an odor even after it is air-dried, but it will be lighter than it was before it was air-dried, but it will not have no odor at all. If a man’s sperm doesn’t have an odor, it’s not a fishy smell, but rather an abnormal condition that may be a result of the man’s prostate gland functioning or suffering from prostate inflammation, which leads to a lack of certain secretions and makes the sperm lose its fishy smell. So, it is normal for sperm to smell if it has an odor.