**Core Concept**
Premature ejaculation (PE) is a male sexual dysfunction characterized by ejaculation occurring before or shortly after vaginal penetration, causing distress or interpersonal difficulty. The definition of PE has evolved over time, with the DSM-5 providing a more specific and clinically relevant criterion.

**Why the Correct Answer is Right**
According to the DSM-5, premature ejaculation is defined as ejaculation occurring in less than 1 minute after vaginal penetration. This time frame is based on the average latency to ejaculation during intercourse, which is typically around 5-7 minutes. The DSM-5 criterion aims to standardize the diagnosis of PE and facilitate communication among healthcare providers.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not specify the correct time frame, which is essential for diagnosing premature ejaculation.
**Option B:** This option is incorrect because it suggests a longer time frame than the DSM-5 criterion, which may not accurately reflect the distress or interpersonal difficulty associated with PE.
**Option C:** This option is incorrect because it does not provide a clear or specific time frame, making it an ambiguous and unreliable choice for diagnosing PE.

**Clinical Pearl / High-Yield Fact**
A commonly used mnemonic to remember the DSM-5 criterion for premature ejaculation is "5-7 minutes, not 1 minute, that's just a tease!" This mnemonic helps clinicians and students recall the correct time frame for diagnosing PE.

**Correct Answer: D. 1 minute.**