Sexy Technique

The Sexy Technique is simply a Transformation Technique used to transform the user into a beautiful, nude woman, or a woman in a bathing suit. Naruto uses it to distract or win over men, sometimes leading to an exaggerated nosebleed (An common manga and anime graphic metaphor for sexual arousal) by the victim. Though some men have been able to resist it.

Since his return in Part II, Naruto has bragged that he has a new-and-improved upgrade for this technique, but he was punched by Sakura into the distance. In the omake chapter in the second Naruto Fanbook, Naruto performs the upgrade in front of Jiraiya taking place during the time-skip.

Trivia

 * The woman Naruto transforms into when he uses the Sexy Technique has been dubbed "Naruko" by the fandom, inspiring many pictures of fanart and fan fiction.
 * In the fandom, the Sexy Technique has been used on various characters of the series as a source for fanart. It is popular in both fanart and convention cosplay.