When two (or more) individuals are cuddling, and one individual slowly strokes the other's penis or vagina in a soft, almost playful way. The couple or group remains in a cuddle position, never escalating to sexual intercourse. The cuddle stroke is meant to be a gesture of endearment towards the individual(s) being stroked. The cuddle stroke is a soothing touch, meant to be casual, but may in fact cause arousal.
"Honey, would you mind giving me a little cuddle stroke? I had a really rough day."