While "thumb" isn't a standard romance genre term, it could refer to "thumbalina" (size-difference) tropes, "green thumb" (gardening/homestead) settings, or even a typo for "thump" (as in "heart-thump" emotional stories).
The phrase "" appears to be a mix of specific descriptors that don't currently point to a single, established trope or literary movement in mainstream romantic fiction. However, based on the individual components, it seems you are looking for an exploration of body-positive romance involving older characters and a specific, perhaps cozy or niche, dynamic. busty sexy mature thumb
These stories resonate because they prioritize emotional intelligence and a "knowing" sensuality that only comes with age. While "thumb" isn't a standard romance genre term,