What is the allure of growth/transformation?

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Hey, noob thread yeah...
Today I was scouring the internet for an AP of Vicky from the Fairly Odd Parents (it happened in the movie Channel Chasers, she turns from 16 to 18, gets bigger boobs, hips) which in itself is funny and pathetic, but I came across this site: http://visibletime.ararchive.com/manga.htm

Now it didn't have what I originally searched for but I spent the better part of over 2 hours just looking at everything...and was really surprised to find whole genres of manga and more fans of this stuff.

I can't tell you when it started with me, it could have had something to do with my early exposure to Sailor Moon, but transformations and growth in cartoons and video games (Birkin in Resident Evil 2 comes to mind) have always fascinated me. God, I even get a little hard watching the most mundane and weirdest shit...in fact looking at everything at that visibletime site had me harder than I've been in weeks.

Anyways, from that site I found this forum, and I'm still surprised there are others like me. I don't plan on posting much but just looking, hence the username.

Yeah, sorry about the noob thread, but this is all coming so fast, finally realizing there's a genre for this kind of sick shit...