I probably shouldn't reply to this, but:

Many in ancient Greece enjoyed sex acts of various kinds without referring to themselves as oriented to only one type of sex act, with only one kind of partner. There were many Greek names for the sex acts and preferences, and the opinions about them varied considerably, over hundreds of years of Greek culture. Moreover, most Greeks were slaves. So sex acts with slaves and children were also common. There were also odd norms that developed at one time or another in different regions (also in ancient Rome). For example, there are writings about the acceptance of the act of sodomy to someone, but the disrespect of the person who is sodomized.

My point is that it's not possible to generalize so broadly about Greek sex acts. More explanations and evidence via search engine:

In ancient Greece, homosexuality, particularly in its pederastic form (relationships between older men and younger boys), was a common and even accepted practice, albeit with specific cultural norms and social expectations. While not explicitly prohibited, the nature and context of same-sex relationships played a significant role in how they were viewed. For example,

Pederasty:

A prominent form of same-sex relationships was pederasty, where an older, experienced man (erastês) fostered a mentor-mentee relationship with a young, unmarried male (erômenos). This dynamic was often viewed as a path to learning, development, and even a source of social and political influence for the young man.

Social Norms:

The societal acceptance of pederasty was tied to its role in educating and shaping young men. The relationship was expected to be consensual, with a focus on mentorship and intellectual development, rather than solely on sexual gratification.

Power Dynamics:

The power dynamics within pederastic relationships were significant, and there were varying social and legal perspectives on relationships between adults of similar age. While same-sex relationships were not inherently condemned, certain types of relationships, especially those involving a submissive adult male, were seen as less honorable or even as "hubris" against oneself, according to some Greek thinkers.

Female Homosexuality:

While less documented, there's evidence of female same-sex relationships, notably in the poetry of Sappho.

Not a Gay Utopia:

It's important to understand that ancient Greek society's views on same-sex relationships were nuanced and different from modern understandings of "homosexuality" or "gay" identity. The focus was often on the specific nature of the relationship and the roles of the individuals involved, rather than a broad categorization of sexual orientation.

Varied Views:

Different city-states and philosophical schools had varying perspectives on same-sex relationships. Some city-states, like Thebes, even encouraged and legally supported same-sex unions. Philosophers like Plato grappled with the complexities of same-sex love, attempting to distinguish between carnal desires and the higher, spiritual aspects of love.

Beyond Sexuality:

Ancient Greek society also valued relationships based on friendship and camaraderie, regardless of sexual orientation, which further complicates the understanding of "homosexuality" in their context.