I've always wanted to do this....just using someone like a dildo. Is it even classed as a dildo if there's a person attached? Anyway, I lubed up my "dildo", got into position and fucked it like there's no tomorrow. I also went as deep as I could as he searched for my fornix. He even pulled me down deeper which was a surprise! And don't worry, of course I put a camera underneath to see things from his perspective!