From the album getting up to no good
This is about being turned on by your own irrelevance. The speaker fixates on someone who gets off on their own reflection, and instead of walking away, they eroticize the power gap. The song claims the other person is narcissistic, but it's really about the speaker's need to be desired by someone who doesn't need them.
When you look into the mirror, does it turn you on? / When you touch yourself / Is your reflection the only thing that gets you off?
Artemas positions the other person as completely self-sufficient, aroused only by their own image. But notice he's obsessing over their solo moments, constructing an entire fantasy of what they do alone. That says more about him than them.
You got beauty in your face / You and I are not the same and that's alright
He admits the hierarchy out loud, claims he's fine with it. But the whole song is about not being fine with it. The repetition across four choruses proves he can't let it go.
I know you're missing me hard and the memory of us / In the candlelit light, know we're breaking apart
Verse 1 said they only need their reflection. Verse 2 says they're missing him desperately. These can't both be true, which means one is a fantasy he's telling himself to feel wanted.
Probably touching yourself to the memory of us
That word 'probably' is doing all the work. He doesn't know. He's imagining a version where he still matters to them, where they get off thinking about him. The whole song might be him talking himself into believing that.
The song thinks it's about someone else's vanity. It's actually about needing to be needed by someone who's fine without you. That 'I kinda like' in the chorus is the least convincing part. If he actually liked it, he wouldn't have to keep saying it.