Mark pushed Dean into the dressing room so that he could watch him try on the briefs.
Dean was too busy trying to take off his thong to argue with Mark. Mark quickly pulled off
his pants and boxers. Dean was shocked to see that Mark had an erection. As Mark bent
down to pull up the briefs, Dean couldn't help but imagine how it would be to force
himself on his friend.
As he thought this, his huge cock began to expand to its full size stretching the thong to
an unbelievable size. His erect member made it impossible for him to get the tong off. As
the thong stretched under the girth of his massive member, Dean was able to see the base
of his cock. He said, "Dude, it must be six inches across!" After hearing this, Mark smiled
broadly and pressed the snap on the front of the over-endowed briefs.
Mark moaned as he felt his cock start inflating. He could feel it slowly becoming larger
and larger as the briefs did their thing. He could also feel something strange happening
to his asshole. He felt it slowly expanding and contracting. It every time it expanded, it
got a little bit bigger. Mark slowly bent forward so that Dean could watch the show. Mark's
ass was also expanding to a nice round bubble.
Dean began to feel differently towards Mark. He remembered how Mark had always been
attracted to him and how Mark was the one who said that he should try on the thong. He
thought about the way Mark had forced him to wear the thong because it made his
package look bigger. He was actually imagining having sex with Mark.
Mark could feel his awareness of his ass increase. He began to try and expand his asshole
even more. He found that he could control the expansion of his ass from very tight to an
incredibly large seven inch diameter. He slowly massaged his growing cock and realized
that he was less interested in it then he was before he put on the briefs. He was almost
entirely focused on expanding his ass as far as he could.
He looked at his watch and realized that his transformation was complete. He glanced
over at Dean and noticed that he was struggling against his thong still. Dean's erection
had become too large for him to maneuver the thong off. "Help me get this off! It's
crushing my balls!" Dean cried. Mark moved in close and said, "Ill save you and he
reached over the bulging top of Dean's cock and pulled the thong down quickly.
Instantly, Dean's massive cock hit him in the side of the face and knocked him to the
ground. Mark was dazed and he slowly began to get on all fours to stand up when he had
another idea. He pulled down his briefs and presented his amazing ass to Dean. Dean
was slowly said, "Are you sure?" All Mark did was moan and expand pull his cheeks wider
apart so Dean could see his expansive asshole.
Dean moved closer and Mark shrunk his ass down ass the tip of his giant dick touched it.
Without waiting, Dean thrust wildly into his best friend's ass. Mark began expanding and
contracting the muscles deep in his ass to milk his friend's cock. He knew that this was a
talent offered to him by the Bottom Boy briefs. Mark's cock was fully erect because of the
anal stimulation.
Mark's larger than life cock was pressing into the floor and pushing him even higher into
the air. He was quickly being brought to orgasm by Dean's giant cock. He could feel the
heat from Dean's massive organ through his entire body. Suddenly, he felt Dean tense and
he knew he was about to orgasm. They both came at the same time. Dean pumped at
least two gallons of cum into Mark. Mark came all over the floor of the dressing room. As
Dean pulled his dick out, Mark tightened his asshole so that none of the cum would leak
out and add to the mess.
Mark and Dean looked around and realized that they had to clean the mess. They both
decided that there was no way for them to fit into the pants they wore before so they used
them to sop up the cum that Mark had released. Mark decided that the long coat he wore
to the mall could cover for the fact that he wasn't wearing pants and he went back through
the isles looking for clothes they could wear out of the store...