Controlled (reigned-in) eroticism and energy, power, and movement.
According to Jung, a symbol for intercourse, especially in women’s dreams.
If you dreamed of having any difficulties with the horse’s saddle, pay more careful attention to your personal affairs. Some change to your current plans might work in your favor.... My Dream Interpretation
Depth Psychology: Riding might indicate your sexual desires, or a conscious effort to guide and control those desires.... Dreamers Dictionary