Is Semen Kosher?

The blood of those who walk on two [legs] is like the blood of beasts in that it renders seeds susceptible [to impurity]. And it is like the blood of a sheretz, in that one is not liable for eating it.

§ Apropos the period of time during which a child nurses, the Gemara continues to debate different aspects of this matter. The Sages taught in a baraita: A child may continue to nurse until the age of twenty-four months, and from this point forward, if he continues to nurse, he is like one who nurses from a non-kosher animal, as a woman’s milk is forbidden to anyone other than a small child; this is the statement of Rabbi Eliezer. Rabbi Yehoshua says: A child may continue to nurse even for four or five years, and this is permitted. However, if he ceased, i.e., was weaned, after twenty-four months and then resumed nursing, he is like one who nurses from a non-kosher animal.

This is as the verse states: “But this you shall not eat, of those that only chew the cud, or of those that only part the hoof; the camel, because it chews the cud but does not part the hoof, it is impure for you” (Leviticus 11:4). The somewhat superfluous word “it” teaches that it alone is impure, but the milk of bipeds is not impure; rather, it is kosher. Furthermore, one might have thought that I should exclude the milk of humans from the prohibition against consumption, as this issue does not apply equally to everyone, since only women produce milk, but I should not exclude from the prohibition human blood, which does apply equally to everyone. Consequently, the verse states “it” with regard to a camel, to say that it alone is impure, whereas the blood of bipeds is not impure, but rather is kosher.

And Rav Sheshet said about this ruling: There is not even a rabbinic command to refrain from consuming human milk. Therefore, this presents a contradiction to the statement that a child who nurses beyond a certain age is like one who nurses from a non-kosher animal.

The Gemara answers: This is not difficult, as this statement that the milk is permitted is referring to when it has been removed from the woman’s body, and that statement, that the milk is forbidden, is referring to when it has not been removed. Fundamentally, human milk is a permitted substance. However, it is prohibited by rabbinic law for anyone other than a very young child to nurse directly from a woman’s breasts, and one who does so is considered like one who consumes milk from a non-kosher animal.

We learned in the mishna: All types of food that healthy people eat may be eaten by one eating them for medicinal purposes on Shabbat. The Gemara asks: The phrase: All foods, what does it come to include? The Gemara answers: It comes to include spleen for healing teeth and vetch for healing intestines, although they are not common foods. We also learned in the mishna: And one may drink all drinks on Shabbat. The Gemara asks: The phrase: All drinks, what does it come to include? The Gemara answers: It comes to include mixing water in which capers have soaked, with vinegar. Ravina said to Rava: What is the ruling with regard to drinking urine on Shabbat? Rava said to him: We already learned in the mishna: One may drink all drinks, and people do not drink urine and is not considered a drink. It is only consumed for medical purposes and is therefore prohibited.

MISHNA: In the case of one who slaughters an animal and finds a placenta in its womb, one with a hearty soul [nefesh hayafa], i.e., who is not repulsed by it, may eat it, as its consumption was permitted by virtue of the slaughter of the mother. Nevertheless, since generally speaking, people do not consume such placentas, it is not regarded as food and so it cannot become impure with the ritual impurity of food even were it to come into contact with a source of impurity. And furthermore, it does not impart the ritual impurity of animal carcasses as it was permitted by virtue of the slaughter of the mother. But if one intended to eat it, one thereby elevated it to the status of food, and the placenta becomes impure with the ritual impurity of food if it comes into contact with a source of impurity. But even so, it still does not impart the ritual impurity of animal carcasses.