Adam's cock is not big enough for Heather

"Look, you have the biggest cock that i have seen so far. You have fucked my like no one before. Brought me to multiple orgasms. And it's been a great experience! And i hope you don't take this the wrong way. I hope you understand, after everything that i just told you. The thing is, that this is just not working out for me. Your cock simply is just not big enough for me!"

"Wait, what?" Adam couldn't believe his ears. "Did you really just say, that my cock is not big enough???"

"Look, don't take this the wrong way! I thought that you of all people would understand. We all have our own special kinks and desires. Your cock is plenty of big. Just not for me! I simply need something even bigger!"

Adam still couldn't comprehend what just happened, and he felt devastated. And it was not because he was overly emotionally attached to Heather, was it? No, she had literally been the first girl that he stumbled upon after his Growth X powered transformation. But he had lost his virginity to her, and that should count for something, shouldn't it? Shouldn't that create some kind of bond? Adam had certainly hoped that they would be able to share many more blissful experiences.
But the crucial point was this: Here he was, even with his improved manhood, and it still just happened. The very first girl, whom he had sex with, told him literally what he has always dreaded that he would hear: That his cock was not big enough. Adam had lived his whole life with that very fear. That because of his small penis, he would be rejected. Because it wasn't big enough. That he would never be able to properly please a woman, because his dick was too small.
The whole situation sucked. It stung. It hurt. And there wasn't a damn thing he could do about it, was there?

Heather noticed how Adam was brooding, and how he obviously didn't take her revelation as well as she had hoped, and thus she attempted to somehow lighten up the mood: "Look, i'm sure that there are plenty of other girls out there for you, who will more than appreciate your spectacular size. It's just not me. I need an even bigger cock."

Somehow this indeed drew Adam's attention: "Wait, what did you just say?"