**Core Concept**
The superficial perineal space is a fascial compartment in the male perineum that contains the external genitalia, muscles, and glands. It is a critical anatomical region that plays a vital role in maintaining the integrity and function of the perineum.

**Why the Correct Answer is Right**
The bulbourethral gland, also known as Cowper's gland, is a small compound gland located within the deep perineal space. It is not part of the superficial perineal space, which contains the external genitalia, including the penis, scrotum, and superficial muscles. The bulbourethral gland secretes a clear fluid that lubricates the urethra during ejaculation.

**Why Each Wrong Option is Incorrect**
**Option A:** The bulb of the penis is a part of the external genitalia and is indeed located in the superficial perineal space.

**Option B:** The crus of the penis is also a part of the external genitalia and is situated in the superficial perineal space.

**Option D:** The bulbospongiosus muscle is a superficial muscle that covers the bulb of the penis and is located in the superficial perineal space.

**Clinical Pearl / High-Yield Fact**
It is essential to differentiate between the superficial and deep perineal spaces to accurately diagnose and manage perineal injuries and infections.

**✓ Correct Answer: C. Bulbourethral gland**