Most people know the story of Beruriah (which is brought down in a Rashi to Avodah Zarah 18b.) There, Beruriah was mocking the words "Women are of unstable temperament/ lightheaded" or "Nashim da'atan kalos." Rabbi Meir said to her, "By your life, you will ultimately affirm their words." He instructed one of his disciples to seduce her. [The student] urged her for many days, until she consented. When the matter became known to her she strangled herself, and Rabbi Meir fled out of disgrace." 
My friend Simcha pointed out something fascinating- Rabbi Meir also finds himself in a situation which is highly improper, and it also has to do with sexual matters!
מינך רבי מאיר הוה מתלוצץ בעוברי עבירה יומא חד אידמי ליה שטן כאיתתא בהך גיסא דנהרא לא הוה מברא נקט מצרא וקא עבר כי מטא פלגא מצרא שבקיה אמר אי לאו דקא מכרזי ברקיעא הזהרו בר' מאיר ותורתו שויתיה לדמך תרתי
Rabbi Meir used to scoff at sinners for giving in to their desires. One day, Satan appeared to him in the guise of a beautiful woman on the other side of the river. There was no ferry, so Rabbi Meir grasped the rope-bridge and proceeded across. When he reached halfway, Satan left him saying: Had they not declared in Heaven, "Beware of Rabbi Meir and his Torah" your life would not have been worth two maahs [a maah is a small coin].
Now isn't that interesting? Here Rabbi Meir arranges this whole test for his wife in order to prove that "Nashim da'atan kalot" and yet when he is faced with a situation where he sees a beautiful woman, he doesn't even need to be seduced- he immediately desires her and comes to her!