The last big one is the bowel movement. When you have a bowel movement, there is something like sperm coming out and the color is yellow, which may be caused by factors such as urethritis, prostatitis, and so on. 1. Urethritis: for example, gonococcal urethritis, may be related to unclean sex, in the bowel movement, the urethral opening area will appear yellow purulent material, mistaken for sperm outflow, may also be accompanied by urethral itching, urethral burning sensation and other symptoms. 2. Prostatitis: it may be related to not paying attention to the hygiene of the lower body, neighboring organs and other factors, can make the prostate gland there is an infection, the presence of purulent substances in the prostate fluid, but also the increase in the prostate fluid, in the stool there will be similar to the semen of the yellow material out, accompanied by perineal swelling and pain, urinary frequency and other symptoms. If there is sperm-like material, yellow in color, and other obvious abnormalities during defecation, you should be alerted to the presence of diseases, and it is recommended that you seek medical attention.