Gemara

(R. Shimon Shezuri): A (male) Nazir shaves Pesach Ohel Mo'ed, but a (female) Nezirah does not, lest this arouse young Kohanim.

Question: "He will stand her (a Sotah) in front of Hash-m." We are not concerned about arousing young Kohanim!

Answer: A Nezirah beautifies herself. A Sotah does not.

Sotah 7a (Mishnah): The Kohen grabs the Sotah's garments. We are not concerned if they tear at the seams, or in the garment itself. He reveals her heart and releases her locks of hair;

R. Yehudah says, if her heart or hair is attractive, he does not reveal or unbraid it.

8a - Inference: R. Yehudah is concerned lest this arouse onlookers, and Chachamim are not concerned.

Contradiction (Beraisa - R. Yehudah): We cover a man (who will be stoned) in one place, in front. We cover a woman in front and in back, for her Ervah can be seen from both sides;

Chachamim say, we stone a man naked (i.e. with only one covering), but a woman is stoned clothed.

Answer - part 1: (Rabah): Here, R. Yehudah is concerned lest young Kohanim be aroused to desire her, lest she drink and survive. When she is about to be stoned, there is no concern.

Suggestion: We should be concerned lest they come to desire other women!

Rejection: Rava taught that the Yetzer Ra incites one only for what he has seen.

Answer - part 2 (for Chachamim - Rava): Here, Chachamim are not concerned for arousal, because we must fulfill "all the women will be chastised";

When one is stoned, that itself is the best admonition!

19a (R. Yoshiyah d'Darei): We learn from a Gezeirah Shavah "hand-hand" with Korban Shelamim. Just like the Kohen waves Minchas Sotah, he waves Shelamim. Just like the owner waves Shelamim, she waves Minchas Sotah.

Question: How do both wave (at the same time)?

Answer: The Kohen puts his hands under the owner's hands, and they wave.

Kidushin 52b (Beraisa - Sumchus): If a man was Mekadesh with his share of Kodshei Kodoshim or Kodshim Kalim, the Kidushin is invalid.

Objection (R. Yehudah): (Kodshei Kodoshim that leave the Azarah are disqualified.) Why would a woman be in the Azarah to receive Kidushin?!

R. Yosi: If she made a Shali'ach to receive Kidushin, or she forced her way in, we must know the Halachah!

Rishonim

Rambam (Hilchos Sotah 3:11): One of the Kohanim in the Azarah grabs her garment even with her face and tears, until he reveals her heart. He exposes her hair and releases her locks, to disgrace her.

Rambam (Hilchos Nezirus 8:4): The Kohen takes the cooked foreleg...and puts it on the Nazir or Nezirah...

Lechem Mishneh: Perhaps the Rambam specified 'or Nezirah' to teach that Halachah 3 (shaving in the Ezras Nashim) applies even to a Nezirah. This is like Chachamim who argue with R. Shimon Shezuri.

Rebuttal (Or Some'ach 8:12): No, he teaches that the foreleg of a proper Eil Nazir is put on her hands, but if it was slaughtered Lo Lishmah (Halachah 12), it is like a regular Shelamim, which she does not wave, and it is not put on her hands.

Rambam (Hilchos Sanhedrin 15:1): A woman is not stoned naked, rather, with one cloak.

Tosfos (45b DH v'Lo Nezirah): The Gemara expounds that the reason a Nezirah does not shave Pesach Ohel Mo'ed is lest young Kohanim be aroused.

Tosfos (Sotah 8a DH Im): Even though it is a Gezeras ha'Kasuv to reveal her heart, refraining is not uprooting the Torah.

Tosfos (8a DH v'Yisgeru): Since there is no obligation for men to see her, they could spread a sheet between her and the men, and release her locks! The Yerushalmi says that they put a sheet between her and the Kohen, and he turns away and uncovers her hair. Why does R. Yehudah disagree? He holds that she would not be shamed enough if men did not see, and women would not be deterred (from doing like she did).

Sefas Emes: Tana'im in the Sifri argue about whether or not they spread a sheet in front of her. Perhaps all agree that it suffices to expose her in front of Hash-m. R. Yehudah says that he did not expose her, i.e. in front of everyone. Chachamim prefer without a sheet, to disgrace her in front of everyone. Perhaps nothing was uprooted! Indeed, the Sifri connotes that R. Yehudah holds that no sheet was spread. However, perhaps the Gemara's question against Chachamim was why they do not spread a sheet.

Tosfos (Menachos 61b DH v'Kohen): The Yerushalmi asks, it would be repulsive for the Kohen to put his hands under hers! They cannot have a cloth in between, for it would be a Chazakah. Rather, they bring an old Kohen. Alternatively, they bring a young Kohen. The Yetzer Ra is not common at this time. The Bavli holds that she holds on top, and the Kohen holds below (their hands do not touch).

Tashbatz (397 DH Eino): I condemn the custom to circumcise a baby in the Beis ha'Keneses in his mother's lap, even if the Mohel is her husband or father. It is improper for an adorned woman to enter among men in front of the Shechinah. The Gemara (Kidushin 52b) assumes that a woman is not in the Azarah, lest this incite young Kohanim.

Poskim

Bach (Teshuvos Yeshanos 17): A curtain in front of the Aron should not be made from a person's garment, certainly not from a woman's (even after she died). One may not look at colored women's clothing even on the wall! Rabah taught that the Yetzer Ra incites one only for what he has seen. R. Yehudah relies on this to allow stoning properly (naked). Here, there is no reason to rely on this.

Igros Moshe (YD 3:73 DH u'Memeila): A woman should not teach older boys secular or Kodesh subjects. However, she would be ashamed to be incited, and so would they, therefore it is permitted in pressed circumstances.