It sent a small shiver coursing through my body.

The goo on it was very warm, almost hot, and it sent a small shiver coursing through my body.

Then the little rubber thing swelled up. It inflated a little bit, then slowly deflated. Then it inflated a bit more before slowly deflating again. It was like something taking small breaths inside my vagina. After about two minutes, it stopped and the rod pulled back, pulling the little thing from my pussy and retracted back into the machine.

"... vaginal resistance test completed," the computer's voice said,
"... test concluded that client's vaginal resistance is very high. Proceeding with vaginal depth test..."

Again I heard the machine's motor turning and again the small hatch opened. This time a small, silver rod emerged. It was covered with the same strange, hot lubrication as the previous one. This time, at the end of the rod there was a small metal ball about a half-inch wide. It moved to my vagina and slowly eased into me. Again the heat of the lubricant sent a shiver through me. The angle of the chair gave me a good view as I looked down and saw my little lips wrap around the silver ball, and I saw it vanish inside me. The rod pressed forward, the lube easing it's penetration. I felt the ball sliding further up my vagina. It wasn't like anything I had ever felt. I watched as more of the rod pressed into my pussy. I panted slightly, my mouth had gone dry.