The bulb shrinks slightly as it firmly presses against my ass. I feel it suddenly become slicker, as if it is excreting that same tingly slime the rest of the tentacles have me covered in. It excretes more and more, rotating slightly to spread the slime along my crack and sphincter. Once I'm lubed up plentifully, the bulb begins its firm pressure once more. This time, thanks to the lubrication, it begins to make its progress inside me. I hold my breath, waiting for the inevitable penetration.
The tentacle takes its time, however, not going all the way in just yet. It pushes its way past the first ring of muscles, just barely entering me, but leaving the second ring snugly taut. It begins its rolling motion once again, secreting even more of that wonderful slime in my ass. My second ring begins to relax as it massages me into submission, a slight moan yet again escaping me. My cock is rock hard at this point, and I wish I could move to finally impale myself on this wonderful bulb that's making me feel so good. It hasn't even gotten inside me yet!
Finally, I feel the tentacle tense up. The firm pressure returns as it works its way inward, and finally it pops into my ass. I gasp at the sudden yet pleasurable intrusion. The tentacle moves inside me a little more before it begins excreting more of that wonderful lube. Once it had secreted enough, it began to explore my depths further. It slides slowly up my ass, and brushes past my prostate, causing my cock to involuntarily spasm. This elicits a reaction from the tentacle, and I feel a strange yet amazing sensation in my ass. The bulb has nestled next to my prostate and has begun to expand inside, filling my chamber slowly but surely. The pressure grows greater than anything I've felt in there before, and the intensity almost pushes me over the edge. But not quite.
Suddenly the tentacle begins to thrust with this large bulb pressed hard against my P-spot. This is too much. I feel my balls begin to tighten as they prepare to release a big load, but as they do so I feel two small tentacles wrap around them and pull them back down. This holds off my orgasm for a few more moments as the tentacle builds up speed inside me. My cock begins to leak precum as the tentacles assault my poor ass, causing my tongue to flop out of my mouth in pleasure. All of a sudden, I feel the tentacle in my ass press very firmly against my prostate and begin to vibrate. This sends me over the edge as my cock spasms violently, spraying my seed into the air ahead of me. I hear it splatter on the fleshy floor below me, and see a few tentacles move down to inspect. Whatever they found, it must have been good, because the next phase becomes intense.
I feel the bulb in my ass shrink down to its original size yet again, and the tentacle begins to slowly worm its way deeper inside me, deeper than I thought possible. As the tentacle invades me to my core, I feel the small tentacles wrapped around my testicles slowly release them, then a sharp pain in each one. I wince as I feel the small tentacles pierce my scrotum, then stab themselves into each testicle. The pain subsides rapidly. Then a strange foreign feeling fills my balls. A feeling I just now realize I've been feeling the whole time- the heartbeat of the tentacles. Every one of them holding me up, the one in my ass, the one around my neck, and now the ones connected to my balls. A constant thump, thump, thump as whatever creature doing this to me has a life of its own. It makes sense, it IS flesh after all.
Having a different heartbeat feeling in your body, tough, that's a wild experience. You feel like a part of yourself has been completely surrendered to a different entity, and it really turned me on. The usual downtime I have between orgasms fades nearly instantly, and each pulse of the heartbeat now controlling my balls re invigorates my stamina. I realize that each thump not only is the heartbeat of the creature I'm now paired with, but is also some hormone it is pumping into me. The constant beat of this creature begins to lull me into a blissful state. My testicles expand with each thump. The tentacle in my ass digs deeper to the beat. Thump, thump, thump as it worms its way deeper inside me, a greater intimate feeling than I've ever had.
Suddenly I feel something very strange, the bulb has reached my stomach. I notice how hungry I really am, yet how full I feel from the ass up. My hunger doesn't last very long, though, as I feel the bulb expand within my stomach, slowly making me feel more and more full. I feel another orgasm building as my cock has reached peak erection again, my balls really tensing up this time. This full-body invasion has made me feel amazing, like I completely belong to this creature now. Submission overwhelms me as the bulb in my stomach fills me more and more, making my body the creature's even more with each thump of its great heartbeat. I cum again onto the flesh floor, this time spraying nearly four times the amount of cum as I did previously, thanks to my newly increased testicle size, no doubt. The tentacle that has completely invaded my digestive system begins to swell this time, stretching out my ass more intensely than before. My cock no longer throbs to my own heartbeat, but to the beat of the creature. It fills with even more blood as it engorges itself bigger than I've ever been erect before. A tentacle latches on to the head and slowly pulls itself along my shaft, swallowing it whole. The whole thing pulses to the beat. This sends me over the edge again, but this time the tentacle around my cock constricts tightly and throbs every time I ejaculate, swallowing every last drop.
Suddenly, everything halts, as if the creature holding me is testing my seed. The tentacle in my ass goes completely still, and the heartbeat thumping throughout my body slows to a near standstill. I wait in silence, contemplating what's about to happen to me. What if I'm not what it's looking for? If my seed isn't what it needs, or whatever it needs from me, will it kill me? Am I about to be eaten? I don't have to wonder in despair for long. A sudden full-blown assault of my senses tells me it accepts my cum, which is a good sign. Or rather, a good sign compared to my fear of being eaten. The thumping restarts again, this time beating much faster than before. Thumpthumpthumpthump as my balls fill rapidly with the hormone the creature is pumping into me. The tentacle in my ass begins to vibrate, slowly building intensity. The bulb in my stomach expands slightly larger, making me feel extremely full. I am truly claimed by the creature.