On today’s daf we see a rabbi throw dirt at another rabbi for asking a stupid question and the rabbis repeatedly talking about flaccid penises. But the gem is the magical thinking of what to do to ensure you have boys when conceiving:
Concerning this matter, Rabbi Ḥiyya bar Abba says that Rabbi Yoḥanan says: Anyone who separates himself from his wife near the expected date of her menstruation will have male children, as it is written: “To distinguish between the impure and the pure” (Leviticus 11:47), and it is stated near it: “If a woman conceive and bear a male child” (Leviticus 12:2). Rabbi Yehoshua ben Levi says: He will have sons who are worthy of teaching halakha, as it is written: “To distinguish…between the impure and the pure, and to teach the children of Israel all the statutes” (Leviticus 10:10–11). The Gemara continues to expound these verses: Rabbi Ḥiyya bar Abba says that Rabbi Yoḥanan says: Anyone who recites havdala over wine at the conclusion of Shabbatot, and not over some other beverage, will have male children, as it is written: “To distinguish between the holy and the unholy, and between the impure and the pure” (Leviticus 10:10), and it is written there once again: “To distinguish between the impure and the pure” (Leviticus 11:47), and it is stated near it: “If a woman conceive and bear a male child” (Leviticus 12:2). Rabbi Yehoshua ben Levi says: Anyone who recites havdala over wine at the conclusion of Shabbatot will have sons who are worthy of teaching halakha, as it is written: “To distinguish between the holy and the unholy…and to teach” (Leviticus 10:10–11). Rabbi Binyamin bar Yefet says that Rabbi Elazar says: Anyone who sanctifies himself with modest conduct while engaging in sexual intercourse will have male children, as it is stated: “You shall sanctify yourselves, and you shall be holy” (Leviticus 11:44), and it is stated near it: “If a woman conceive and bear a male child” (Leviticus 12:2).
Oy vey. I hate to say it, but the science does not prove this one right. But, it’s pretty funny.
While not having sex with your partner except in a certain window between menstrual cycles does NOT guarantee boys, it does help with fertility!
When is a woman most fertile? Apparently about 5 days before ovulation to the day after ovulation. A woman typically ovulates 14 days before her period. So, if your thinking about a man staying away from his wife if she is menstruating – it’s more likely he will be having sex with her while she is ovulating. So, it won’t guarantee a boy, but it does help with conception. (And thank God. What would we do without girls?)