"they didn't have the same concepts of sexual orientation and gender back then"
- what it means: ideas about platonic affection were much broader and more permissive, gender was in some ways both more fluid (because it was strongly tied to presentation, so if one looked like a duck and quacked like a duck...) and more restrictive (because genders besides male and female? wat?), sexual orientation was in many people's minds almost inextricably linked to gender/gender presentation, and while the concept of homosexuality definitely existed and people knew about it as something distinct from platonic friendship, it was considered a practice as opposed to an identity
- what it doesn't mean: LGBT people didn't exist before the 20th century
- straight historians, take note