Rob turned to show the salesman what his cock had expanded to, only to find the salesman had kicked off his pants and was pulling his shirt off over his head! The salesman looked at Rob with a predatory smile, and Rob saw that the salesman started to become more muscular, and even started to grow taller! and then he saw that the salesman's already generous endowment was starting to grow quickly to monster cock proportions!
"Call me Glenn!"
"What... what's happening?"
"Us!"
And Rob felt overwhelmed with lust, he was as suddenly as horny a total sex freak as his penis was massively oversized!
Glenn went down to his knees and began sucking off Rob. Rob didn't even know he was bisexual until this moment, but suddenly he was pretty sure he was 100% gay now!
"Fuck yeah Glenn you like my monster cock?"
Glenn just grunted excitedly. While Glenn continued to suck on Rob's cock, Rob saw the display of chocolates spread out across the counter next to him. There was a white chocolate muscleman, and there was a bigger, more muscular dark chocolate muscleman right next to that one.
"Eat some of the gooey ones! They will make you cum a LOT more!"
and then Glenn was down on his cock again. Rob grabbed 4 of the gooey chocolates, and popped them in his mouth. As they dissolved he felt his balls churning with more and more cum! Not only that, they were growing bigger and heavier! Glenn grabbed them and moaned excitedly as Rob's balls swelled to the size of large oranges!