Great question! The answer is yes: after a male becomes aroused, a liquid called pre-ejaculate can seep out the tip of the penis. Although pre-ejaculate itself doesn’t contain sperm, it travels through the urethra in the process of leaving the body, and can pick up sperm left over from previous ejaculations. That means pregnancy is possible even before ejaculation has occurred. Teen Clinic recommends wearing condoms 100%, for the duration of sexual activity, to best reduce the risk. Remember, your partner may not have complete control over when ejaculation occurs; it’s better to be safe if you’re not ready for pregnancy.