This is a very gradual change that is seen in older men
. Second is diet. The food frequently
eaten by a man may have an effect on his semen. For instance, a dehydrated male is likely to have lumpy, drier semen. Yellow semen may be the result of a diet rich in garlic, onions, legumes, grains, nuts, broccoli, cabbages or asparagus. Third is the length of time that has passed since the last sexual encounter and/or ejaculation.