Final answer:
Cowper's glands, or bulbourethral glands, are in males and help lubricate the urethra and neutralize urine acidity, playing a role in ejaculation. Pre-ejaculate fluid may contain sperm, making withdrawal an unreliable contraceptive method.
Step-by-step explanation:
The Cowper's glands, also known as bulbourethral glands, are found in males and their primary function is to provide lubrication during intercourse. Specifically, they release a fluid that lubricates the urethra for sperm to pass through, neutralizes traces of acidic urine in the urethra, and helps in cleansing urine residues from the penile urethra. This fluid is sometimes referred to as pre-ejaculate and may contain small amounts of sperm, which is why withdrawal before ejaculation might not always be an effective method of contraception.