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.