Whatever way this device manages to do stuff like this, it continues to amaze you. Your groin is a piece of flat stone from a statue; yet somehow, it functions and feels like a human female's genitals. Rubbing it gives you a feeling of ecstasy somehow; case in point, you're still running your index finger against it subconsciously. "So many possibilities...." you groan.
But, right now, you seem to be obsessed with making yourself feel good. Suddenly, a thought comes to your mind, what would happen if you tried to have sex, or penetration of any kind with this stone pussy. This gets you excited, and you sprinted back to your apartment. Upon opening the door, you learn Mike and Veronica have left for some other place; this was perfect for you. Veronica had left her purse on the floor, and you knew what to look for. After digging around inside, you finally found a long black dildo.
You didn't even bother waiting, before shoving the phallic piece of plastic straight into your rock crotch. Surprisingly, the dildo didn't collide against your stone groin; it actually went inside it. There wasn't a hole or anything, it was like your stone pussy was made of rubber or soft material when the dildo pushed into it. It still felt fantastic, so you thrust the sex toy in and out with such ferocity. Soon, you had the best orgasm ever; your hand let go of the dildo and it was shot out of your rubbery pussy. Putting your fingers back on your stone crotch revealed that it was normal stone again, it felt cold and hard and was devoid of any fluids. "How interesting..." you moaned.