In Felix Mendelssohn’s Op. 30, No. 6 Gondola Song, the very character of the lilting motion is sustained in the Left Hand with a metrical awareness of Two beats per measure, not 6. The composition (from the Songs Without Words album) is in 6/8 but translated as duple compound, giving a leaning emphasis on the first of two/3-8th note groupings. In the opening bass measures, rotation of the arm also assists the floating, flowing nature of the music, making the journey down a Venice canal a peaceful one.
This is a wonderful learning experience on so many musical/technical levels as I demonstrate in the attached video. Very slow practicing preserves all nuances of phrasing while a student manages the lighter half of each measure with arm weight transfer and a supple wrist.