To pre-heat an object or region of space for oneself or others to experience. Thermonsation, the process by which one thermonsates, is commonly referenced in public spaces whereby a stranger has pre-heated an object of interest preceding an individual's arrival.
Derived from a conjunction of the prefix "thermo", from Greek meaning heat, and inseminate, meaning to sow or implant seed into.
(person 2 upon sitting down): Aw gross, this seat is totally thermonsated.
(person 1): Dirty. You're probably sitting in the drippings of some fat old man's hot body.