Bunnys like to bounce

Luma sat down on the bed next to Jack. Jack noticing her massive erect bunny penis standing upright, small beads of precum on the tip the hard pole just waiting to be inside him.

"My lovely bunny muffin how was your first squirt, how did it feel hmmm, I got the perfect stimmy on your little bunny boy spot huh" she giggled

Jack replied "Oh yes it felt amazing but I'm really not used to having this set of genitals. Its so different from my penis before like everything is a totally new sensation I don't know how to describe it yet but i love it and I want to share it with you, I need you in me now.".

"Oh excellent I'm so glad my perfect lab mate is feeling good, but now we must start our breeding session. Ok my honey bunny I think for science and our first time the best starting position for us would be if you get on top and started bouncing, this will give you some of your own control and help you get used to your new body right my love. As bunny boy you should love bouncing on my hard penis, it's what you should love and do best now, bouncing, stimulating yourself to make your body make its submissive sperms on mass for me"

Jack excitedly got up turned and faced his bunny mate who was sitting on the bed, he faced her and positioned his legs each side of hers before they working together lifted his feet up to standing on the bed. His legs straddling her hips he started to squat down. His new boy pussy at this point was feeling blood pumping all over in anticipation, heat moving in swirls and spread all inside. The juices he was making leaking down onto her large hard shaft. There faces now mostly both at the same height, they kissed passionately deep and sticky making out. Jack Ever lowering his hips slowly both of them now had one hand on each other griping tight for stability, both their other hands were on her penis guiding it to the entrance of his male virgin pristine pussy. Her tip found his labial skin and parted the slick folds, it was a new sensation for Jack as he got good shudders and it felt ever so good in anticipation. He was now in position with her huge bunny tip pressing gently against the new entrance of his new bunny hole. "Ok my bunny boy, go on, you can take your time go as fast or slow as you like it's up to you....." she said gently. Jack replied excitedly "Can't wait any longer!, heat inside to much must have you inside, having new genitals so strange, feels, need..." barely starting and finishing the sentence before he slammed down his hips not thinking about anything. His pussy had been tighter and her penis bigger than he had cared to expect causing resistance as he had slammed down. Whilst his juices had helped lubricate inside slightly and he had taken in a very large portion of her bunny breaker but his insides ached with great pain , which was slowly tuning to pleasure in places as he adjusted. One place deep in however was only pain he felt, it felt like he had been ripped open and when he looked down he saw her penis most of it had disappeared underneath his new crotch and into him but the part that remained had small streeks of red blood running down to her base.

"Oh I wasn't expecting that my poor baby boy, to over eager. I hadn't anticipated you would be so rough with yourself, are you ok my baby" she exclaimed "I think I might have over done it?" he replied in a raspy voice "It hurts inside and am I bleeding?" He inquired still in a pained tone. "Oh my poor bunny bun, I thought maybe you might prepare yourself inside a little by going slowly but now I see we both couldn't wait any longer. It appears that we have broken through you little bunny boy hymens inside, they are tight skin ceils that show ones virginal status or so I recall from what I saw in your brain scans. When you pushed yourself down so fast on me I felt my penis enter and break one it was amazing feeling it and the ribbing inside your tight warm walls felt divine, oh I must write that feeling down in a note somewhere. Anyways after that my tip of my huge new appendage felt a blockage only briefly since you were so fast, but as you had gone so quickly I felt myself breakthrough and I couldn't help it, it was so tight and warm and wet it felt amazing for myself but I can only imagine from past experience it perhaps wasn't as pleasant for you being torn open like that, but I think you will be fine soon, I designed you to be durable as a good scientist should. Tell me all about it I must know what it was like for science tell me all about it in detail my mate."

"Oh I had a hymens?", Jack mumbled in immediate uncontrolled response now seemingly not caring much anymore with the pain dissipating revealing only a new feeling of being full stuffed with large dick to bounce on. "I didn't know that at all, though I should have figured given I was a virgin I suppose, it still really hurts inside a bit but places are starting to feel good maybe? When it went in it felt like I was being filled like never before, it's like I had a hunger inside me and I needed it to be in me. I didn't realise there was hymens inside I couldn't feel it at all before and even when I went to fast all I felt was a bit of resistance like maybe you were to big or I was to tight. Maybe if I had gone slower I would have felt it more, but I think it would have been less painful on other areas inside if I had gone slow at first but more painful for the hymen point if I had to break through slowly unlike like that."

Luma had prior to this called out to a computer and started a recording to make sure she got all her data fresh and noted down. Whilst she hadn't expected it to happen like that she was super intrigued by the feeling of the outcome and of how it felt from Jacks obediently descriptive description also. Excitedly listening to him speak.

"Tell me more darling, how is the rest of you body feeling?" she inquired. Jack replying "uh I guess mostly normal, my main focus is feeling you inside me right now, should we move or not I'm not sure what will make it better yet, I'm feeling ever so hot inside, I want to, I need to fuck. I feel like my ears and tail aren't things I'm used to I'm not sure how to describe them. I guess the only other things I notice are that my male nipples and male clitoris are feeling kind of tingly and super sensitive it's like I can feel the air passing over them and it feels like my er male bladder? Or inside here it feels like it's quite heavy at the front like it's full?"

She excitedly started up "Interesting seems my modifications are mostly working, so to your knowledge as of yet no indication of feeling sperms produced yet, mmm oh how exciting perhaps we try start up again when you feel ready, let's try get the rest of my appendage inside you and take it slow before we start to move again perhaps movement might make you feel sperms being produced I wonder. Maybe once we have a good rhythm going and it's not painful anymore you can focus on the bouncing and I can try help focus stimulating you in your sensitive areas. These are all great notes so far, please let me know more when it is relevant. As for your other notable sensation I think the fullness you refer to might be your production of squirt, of course your going to need a lot of that as you are going to orgasm with male pleasure so much whilst your bouncing on me, I fully expect to be drenched in your sweet sweet pheromones it's going to make me go wild so I can have my own orgasm inside you. How does that sound to you are you intrigued?"

"Oh ok interesting" he said rather submissive and obediently in a voice getting slowly more monotone. "I guess I'm super excited for that, maybe I can try start up again now? Id like to feel myself move." He continued.

"Sounds good my bunny baby, ok this first bit might hurt a bit but Luma studied hard and created you an amazing sexy boy hole and so she knows after that it will get better ok. First I'm just going to get all the way in." she said Jack bracing himself felt his hips move down as her large rod move upwards going inside, going deeper and deeper till hit hit something inside and his pussy lips bottomed out flush on the base of her shaft.