This character uses her/his body to wash another character. Apply i1939 to the receiving character.
A Bodysponge is someone, mostly a woman, who uses their body to wash, usually (but not limited to) the back, of another character. This creates friction which may or may not lead to i1826. Can also result from (or to) sexual tension or as a form of gratitude.
Do not confuse with i1888, which refers to macrophillia, whereas here both are normal-sized.