א הַבָּא עַל אַחַת מִן הָעֲרָיוֹת דֶּרֶךְ אֵבָרִים, אוֹ שֶׁחִבֵּק וְנִשֵּׁק וְנֶהֱנָה בְּקֵרוּב בָּשָׂר, הֲרֵי זֶה לוֹקֶה, וְחָשׁוּד עַל הָעֲרָיוֹת. הַגָּה: וְהַבָּא עָלֶיהָ, בֵּין כְּדַרְכָּהּ בֵּין שֶׁלֹּא כְּדַרְכָּהּ, כֵּיוָן שֶׁהֶעֱרָה בָּהּ דְּהַיְנוּ שֶׁהִכְנִיס הָעֲטָרָה, חַיָּב עָלֶיהָ מִיתָה אוֹ כָּרֵת. וְאֵין צְרִיכִין לִרְאוֹת כְּמִכְחוֹל בִּשְׁפוֹפֶרֶת, אֶלָּא מִשֶּׁיִּרְאוּ הָעֵדִים אוֹתָם דְּבוּקִים זֶה בָּזֶה כְּדֶרֶךְ הַמְנָאֲפִים, נֶהֱרָגִים עַל זֶה (טוּר), וְהָאִשָּׁה נֶאֱסֶרֶת עַל בַּעְלָהּ (נ"י פ' שֵׁנִי דִּיבָמוֹת). אִשָּׁה גְּדוֹלָה שֶׁבָּא עָלֶיהָ קָטָן פָּחוֹת מִבֶּן ט' שָׁנִים, אֵינָהּ חַיֶּבֶת מִיתָה עַל יָדוֹ (טוּר). וְנִרְאֶה לִי, דְּהוּא הַדִּין אֵינָהּ נֶאֱסֶרֶת עַל בַּעְלָהּ. וְלָכֵן כָּתַב הָרַב בַּעַל הַטּוּרִים הַרְבֵּה דִּינִים אֵימָתַי חַיָּבִים מִיתָה אוֹ לֹא, נָפְקָא מִנַּהּ בַּזְּמַן הַזֶּה בְּאֵיזֶה בִּיאָה אִשָּׁה נֶאֱסֶרֶת עַל בַּעְלָהּ, וְעַיֵּן בִּפְנִים. אִשָּׁה פְּחוּתָה מִבַּת שָׁלשׁ, אֵין בִּיאָתָהּ בִּיאָה (טוּר), דְּכָל פְּחוּתָה מִשָּׁלשׁ שָׁנִים אֵין בִּיאָתָהּ בִּיאָה (טוּר) וּבְתוּלֶיהָ חוֹזְרִין (בְּהַגָּהוֹת דִּיבָמוֹת). אֲפִלּוּ נִתְעַבְּרוּ הַשָּׁנִים, בְּתוּלֶיהָ חוֹזְרִין (דִּבְרֵי הָרַב מֵהַיְרוּשַׁלְמִי):
1 If one has bodily contact or petting with one of the arayot (people with whom sexual relations are forbidden), or he hugged and had genital contact (literally kissing; c.f. Yevamot 55b) and benefited from nearness of the flesh, he receives (biblically sanctioned) lashes, and in suspected of having relations with arayot. Rema: if he had intercourse with her, whether vaginally or anally, as soon as he begins intercourse, which is defined as insertion of the glans, he is liable for death or excision. And the witnesses do not need to observe closely similar to insertion of the eyeliner in the tube, rather as soon as the witnesses see them intertwined with one another in the manner of adulterers, they are punishable by death (Tur), and the women is forbidden to her husband (Nimukei Yosef, Yevamot chapter 2). An adult woman who had relations with a minor male under the age of 9 years, is not liable for death at his hand (Tur). It appears to me that she is similarly not forbidden to her husband. And therefore the Rabbi, author of the Turim code wrote many laws defining when people are liable for death or not. The modern day repercussions of these laws (when we no longer administer capital punishment) is that they define which relations cause a woman to become forbidden to her husband, and see further. A female less than 3 years old, her intercourse is not considered as intercourse, and her virginity returns (Hagahot Yevamot). Even if the years were intercalated (e.g she had intercourse at 37 months old in a leap year) her virginity returns (words of the Rav, based on Yerushalmi Ketuboth chapter 1).