Lately I've been having my wife help with morning stretches while still in bed. I pull my dick back behind my legs while laying on my side with my back toward her. She lays on her side and grabs it just below the head and starts to pull. Kind of like the
between the cheeks stretch. Since she is afraid to pull too hard I seem to get the right tension.
With her pulling and me pulling away I can get a nice long stretch, not to mention some other occaisional goodies as a bonus!