A non-exhaustive list.
Wow, I want to write my own list! This was beautiful.
Flopping onto a made bed, especially a hotel bed or one that's in a loved one's guest room. (This was inspired by your 3pm Reddit but activates other pleasure sensors for me.)
I love the 'cat sandwich' part of this. :).
I thought I was the only shower sitter! It's divine. I treat it like sauna time.
Letting my dog or baby lay down on me with all their weight. Wrapping my arms around them.
Cozies and morning pages. Yes!