hahah... anyways. These drops off any "Luminians" which are essentially all the mobs in the Al'Taieu region, which some calls {sea}. They drop Tissues and Organ rarely, and yes that refers to body parts. They are used in a quest for the elemental obi and gorgets.
The Luminians have very runny noses; if they were to forget their tissues at home, they run the risk of splattering all they converse with. Unfortunately, the gland that controlls this substance is triggered by emotional stress, which usually means that more gunk will flow.