Sexuality as Descriptor vs Identity

It seems like when sexuality is brought up, especially in the last 60 years, there’s a trend towards sexuality as identity rather than behavioral descriptor. Sexuality is often more “I am X” than it is “I do X”.

It seems like there’s a lot of stress when one person sees sexuality as describing behavior and another as an identity or sense of self

I feel like some of this has always been present in European/American culture, with gay people being seen as possessing some undesirable “essence”. But the self articulation of sexuality as a way to create and explain one’s self seems more recent, especially with the internet where the words and identity forms are the first thing people engage with and our real life behavior is obfuscated

Has this distinction around viewing sexuality been written about much?

What about the broader “move towards identity” that seems reflective of how the internet encourages self and other view?