Wanting a change

John was a good looking guy, but always felt rather generic and lost in the crowd in his home town. He was of average height at 5'10, and at 25 had a trim hairy body with sandy brown hair and blue eyes, he was very much an all american guy. The one place he wasn't average was his cock, which was about 7.5 inches long, quite thick and circumcised. When it came to the men John liked, he had an eye for guys who stood out a bit, he preferred chiseled muscular redheads, or slim pale guys with jet black hair, guys who were just different from him. Which is what led him to his current boyfriend Ken.

Ken was 5'4, Japanese with pale ivory skin and jet black hair, he was exquisitely muscled and completely smooth except for a small patch of hair above his cock which at 5 inches and uncut fit his slight but muscular build. He was everything exciting and exotic that John liked in a guy especially compared to his generic american look. Of course Ken was lucky because he found John very attractive as well, but he knew he could never take John home with him, since John would never be accepted by his family.

One day after coming home from his boring job at an architecture firm, John walked in to find Ken stretched out shirtless on the couch watching TV. John could not pass up the opportunity presented before him and immediately walked over and got on his knees by ken and ran his had over his smooth muscular chest.

"wow Babe you are so sexy, I am so lucky to have you" said john as he kissed Kens chest

Ken smiled knowingly "lucky to have me or jealous you're not me" he said with a wink

John laughed off the comment and kissed his way down to Kens waist and pulled out his hardening cock and lovingly started giving him a blow job. John loved to suck off his man and proceeded to lick Kens smaller cock from base to tip. It was so different from his own and he loved it, John loved deepthroating Kens perfect little cock and stroking his tight smooth balls. Ken leaned back and watched John close his eyes and bob his head up and down on his cock from tip to base as he enjoyed sucking him off. Ken knew this was his boyfriends favorite activity, sucking him off, and always let him enjoy it since he was so good at it. He looked down at johns huge throbbing bulge and knew they would wrestle later to see who got to fuck who, though Ken was smaller he often won since he was so fit and flexible. Though they both enjoyed topping, Ken preferred it to bottoming especially since John was so hung, so Ken always tried to win.

As John continued to suck the cock, Ken could feel himself getting close to cumming... he smiled to himself because this was his favorite part. He never let on to John when he was going to cum so it was always a surprise. Ken closed his eyes and leaned back focusing on his cock and the mouth sucking it. Then just as he reached the edge of no return his cock exploded in Johns mouth. John looked up at Ken, as Ken grabbed his head and held him where he was with his cock buried down Johns throat as he started to shoot his load. John moaned as he felt Kens cock spasm and pulse with every surge of cum he shot into Johns mouth. John just kept sucking and swallowing as Ken smiled a secret smile and sighed for what was to come. Finally Ken let go and John eased back off his cock and took a breath, and smiled up at Ken.

Ken knew that John fetishized Asian men and had a surprise in store for him, Ken worked at a pharmaceutical company where cutting edge were made. The latest he had in development used the CRSPR technology to transfer genes through various methods. Though untested Ken thought he had the kinks worked out and had dosed himself earlier that day. He had designed the to work through his semen and he knew when John swallowed his load he would start to see changes... Changes that would let John become what he fetishized.