“On second thought am I really going to cover up this body that I just got?” Said David out loud. He undressed again. He was starting to get used to the idea that this hairy, manly body was his. Looking at his dad ass in the mirror he started to grope it, and around front his new dick started to become erect.
David went back to the table where his dad was sleeping peacefully in his ex body. He lifted up the sheet and saw his former smooth little bubble butt.
“Damn I bet that’s feels good to rub on,” said David, whose new penis was now fully erect, “I don’t think dad could object to me feeling up my own original body..”
He hopped under the covers and pressed his new daddy dick against his former ass. He moaned at how good the soft skin felt. He started to move his hips, rubbing his cock against his dad’s ass. With his hands he felt up his dad’s new flat teenage chest, working the nipples to be as erect as his old ones currently were.
He then reached around and grabbed his former penis which had become erect from all the fondling, standing four inches out and hard as a rock.
His dad awoke with a grumble, “Whaa?”
“Surprise dad, the experiment was a success!” Said David.
His dad couldn’t figure out why the experiment being a success would be a reason for his son to be pressing that 40 year old cock against him, or why he had a hands that weren’t his holding his new dick and balls. He got out of bed and threw the hospital gown off in front of the mirror. He saw that he was in his son’s teenage body as planned, and that he had a very hard erection that was smaller than his former cock. He turned around started pawing at his new smooth little bubble butt, and even spread his cheeks to look at his new hole.
“Fuck dad, you’re turning me on with that little peep show,” said David, who was stroking his 40 year old cock, still on the hospital bed.
“I don’t know why, but I’m attracted to you- I mean me- I mean, both of us and our new bodies. If your mother found out she’d kill me,” said David’s dad.
“But she’s not here right now, is she?” Said David. He patted the bed and his dad came over and started making out with him and groping his former forty year-old body.
“I’m willing to do this, but I want to be the one to fuck you,” said his dad.
“That’s fine by me,” said David, “consider this dad pussy yours.”
The two of them continued making out until they felt the urge to go for anal. David’s dad inserted his teenage penis into David’s new muscular, hairy fat ass, and David started moaning uncontrollably. It wasn’t a half an hour until they came together, and came harder than either of them had ever done.