I did 2 sperm cultures so far and they were neatly sterile without bacteria, but my sperm still smells bad. it smells very bad like my sweat, like a japanese apple. what could be happening to me and why has the smell of my semen changed and is it wo?

Different foods an affect smell of urine sweat likely ejaculate. Your body is talking to you. Listen and take good notes. What foods have you eaten the day of or day before ejaculating and tests smell of ejaculate. You might ask local prostitues what does it in men like you who live where you live. Asparagus might be one to test. When you think you have found a food stop it and see.

Normal semen has an unpleasant odor. If is not feasible to provide a more meaningful opinion without examining you and your semen. For healthy diet: http://www.choosemyplate.gov/., exercise 30 minutes/day, drink enough water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. Get HPV vaccine. Wish you good health!