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A lot of people call Anko a Sex-Crazed Sadist.

And a lot of people are right.

However, people would be wrong if they claimed that she were the biggest nymphomaniac in all of Konoha. Anko herself would tell you that Uzuki Yugao easily outclassed her in that area, if only for the reason that Yugao had more of it, while Anko just happened to be the kinkier of the two. There was also the fact that Yugao always had sex just for the sake of having sex. And while Anko certainly enjoyed sex as much as anyone, there was a time when she'd had ulterior motives for it.

When she had returned to Konoha after playing the unknowing lab rat for Orochimaru's Curse Seal, the Kyubi had already come and gone, leaving her quite unprepared for the sudden impact of the pheromone on her newly developing body. And, to put it lightly, she didn't have a whole lot of friendly supporters to turn to. She could count them all on one hand, as a matter of fact. And they weren't always around when she needed them.

Then her body started to mature. Almost overnight, those same pricks who dismissed her with mutterings of 'Snake Slut' and 'Orochimaru's Sloppy-Seconds', all started trying to hit her up for sex. She landed eight of them into Intensive Care before Sarutobi sat her down and politely asked her to stop injuring all of his ANBU. So for a few months after that she stuck with simply verbally emasculating every two-faced bastard or bitch who tried approaching her.

Surprisingly, it had been her oldest and closest friend, Yuuhi Kurenai, who had made the suggestion of using sex to her advantage against them rather than simply shutting them down point blank. At Anko's curious prompting, the genjutsuist went on to give various different examples of things Anko could do to make people regret the way they'd treated her; four of which would later be compiled into the growing list of Anko's Obscure Snake-Style Techniques. In the end Kurenai had laughed the whole thing off and went on about her day as usual, completely missing the wicked gleam that had appeared in the younger girl's eyes.

Two weeks later, on the way home from hearing about Anko's recent activities from a couple of the 'victims', nobody else was around to hear Kurenai whisper the words, "Oh God, what have I done?", but the whole village did give a collective, unexplainable shudder when she did.

And the rest, as they say, is history. After a few years of exacting 'vengeance' on the villagers, Anko came to the conclusion that she rather enjoyed dressing provocatively, teasing and tormenting the populous, and just letting loose and doing whatever wild or kinky thing that came to mind with whoever was around at the time. It was fun.

http://www.fanfiction.net/s/6549314/4/