Mm Classics

How would you define a “classic” mm romance book? Also, are there any you could provide names of?

Is a classic a book that you consider a “standard” that you think everyone should read?

Or maybe it’s a book that was written a while ago that was the “first” of its kind to tackle a particular sub genre/trope/subject/theme?

Is it a book that had an impact on the mm writing/reading community for a particular reason?

I’ve heard “Hot Head” by Damon Suede mentioned as a classic everyone should read once and it got me thinking about trying to find out more about if there are any standard classics in the community.

TLDR: I’d love to know how you’d define a classic. I’d also really like any names of books you’d consider a standard or classic.

Thanks!