We're starting it off with experimental robot vore.
A tall being of metal, gears and pipes stands in front of you, carefully assembled into a humanoid form. In the rainy night, all you can see are the pulsating wires and cable, filled with a warm, bright blue liquid. You should probably be afraid, but you only have one thought.
Oh, it must be heavenly to be inside of him.
Though the 9 feet tall entity doesn't understand the appeal, or why you'd wish to be inside of him, he obliges and picks you up - humans are just too cute to say no to.
In order for you to enter his body, though, he needs to remove a tube with the bright blue fluid that's connected to his "mouth" first... luckily, even if it's a bit painful for him, the chemical that helps him breathe isn't harmful for you. It feels like you're going down a comfortably warm water slide...
Once you're inside his stomach, his voice comes clearly to you, despite the static... he's checking on you. Did you make it? After he reconnected the tube, he seems to be fine again as well. The fluid seems to circulate around you inside small tubes, keeping the inside of his stomach bright enough for you to see. So far, so good.
But he needs to remove the excess temperature from his body somehow, in order to keep you from overheating. Occasionally, steam rises up, and explodes out of him with the sound of horns and pipes. It... embarrasses him a little. Is that something like a burp, perhaps? Maybe rubbing his "belly" can help... if he even feels it at all.
He certainly feels it. What a strange sensation... a little human is giving him a belly rub. From inside. Oh, how he adores mankind... always so helpful and supportive, even in the weirdest situations.