**Core Concept**
Greek love, also known as pederasty, is a historical and cultural phenomenon where an older male in ancient Greece would form a romantic or erotic relationship with a younger male, often a teenager. This practice was not only tolerated but also celebrated in ancient Greek society.

**Why the Correct Answer is Right**
Greek love was characterized by a mentorship or pedagogical relationship, where the older male, often a citizen, would take on the role of a mentor or lover to the younger male, often a non-citizen or a slave. This relationship was seen as a way to educate and civilize the younger male, and was often romanticized in ancient Greek literature and art.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe the concept of Greek love. While it may have involved physical intimacy, it was not solely defined by this aspect.

**Option B:** This option is incorrect because it implies a consensual and egalitarian relationship, which is not consistent with the historical record of Greek love.

**Option C:** This option is incorrect because it is too vague and does not capture the specific cultural and historical context of Greek love.

**Clinical Pearl / High-Yield Fact**
It is essential to remember that Greek love was a complex and multifaceted phenomenon that cannot be reduced to simplistic or modern categories. Its historical and cultural significance lies in its representation of the complexities of human relationships and the power dynamics involved.

**Correct Answer:** D.