fluid to your semen (ejaculate). Ejaculate is a whitish-gray fluid that releases from your penis when you orgasm. The fluid contains enzymes, zinc and citric acid, which help nourish sperm cells and lubricate your urethra (pronounced “yer-ree-thruh”). The urethra is a tube through which ejaculate and pee flow out of your body. Your prostate’s muscles also help push semen into and through your urethra when you orgasm.