The uncontrollable back and forth circular motions
made by a woman's hips when her man has
made her
horny but is not there to satisfy her sexual cravings and NEEDS.
My hips undulate when I'm in the saddle, riding you.
My hips undulate wildly when you are
far away and we have
phone sex. That's phone fucking at it's best.
When you
talk naughty to me like THAT, my ass take on a life of it's own, undulating relentlessly while your words make me cum over the phone. I quiver. I convulse, I spasm. I cum. Undulating ceases.