## Core Concept
A varicocele is an enlargement of the veins within the scrotum, similar to varicose veins in the legs. This condition is a common cause of reversible male infertility. Varicoceles are usually found on the left side due to anatomical differences.

## Why the Correct Answer is Right
The correct answer isn't directly provided, but we can infer that the question seeks an exception regarding characteristics or implications of varicocele. Typically, varicoceles are associated with:

- **Left-sided predominance**: Due to the anatomical difference in how the left testicular vein drains into the left renal vein at a 90-degree angle, creating higher pressure and reflux.
- **Impact on fertility**: Varicoceles can lead to decreased fertility through various mechanisms, including increased temperature of the testes, oxidative stress, and semen analysis abnormalities.

## Why Each Wrong Option is Incorrect
Without specific details on options A, B, C, and D, we can still discuss general misconceptions about varicoceles:

- **Option A:** If it suggests varicoceles are more common on the right side, this would be incorrect as they are more common on the left.
- **Option B:** If it implies varicoceles have no effect on fertility, this would be incorrect as they are a reversible cause of male infertility.
- **Option C:** If it states varicoceles are associated with testicular atrophy, this would actually be correct, making it not an "except."
- **Option D:** If it mentions a specific characteristic or consequence not generally attributed to varicoceles, it would be incorrect based on that inaccuracy.

## Clinical Pearl / High-Yield Fact
A key point to remember is that varicoceles are a common and treatable cause of male infertility. The **"bag of worms"** description is classically used to describe the palpable sensation of a varicocele.

## Correct Answer: D.