I don't get it. This guy gets off on being tiny, so he and the object of his affections give their virginity to each other when HE'S the bigger one instead of keeping her as the giantess you'd think would be more arousing to him? Shorter men have a hard enough time with the ladies as it is. If everyone ELSE witnessing his sudden shrinking is so weirded out by it, why wouldn't SHE run off with the rest of them?
It would've made more sense if he tried to ask her out a couple of times, but his low self-esteem that came with his smaller stature kept him from going through with it. He has his little subconscious epiphany and decides that he actually LIKES being smaller, then he rides that wave of confidence and finally asks her out. She says yes, and it turns out that he really had nothing to worry about since she KNOWS that finding someone taller than her would be more or less impossible (forcing her to see different, better values in men than JUST their physical prowess), and ironically enough, his boost in confidence made him one of the 'biggest' men she's ever met. The story ends with him giving himself to the giantess of his dreams, and while she's dabbled here and there with a couple of normal/bigger boys previously, THIS ends up being the best sex she's ever had, and she only wants MORE from this little guy.