Комментарий к Микваот 9:3

ובית הסתרים באיש – for a man is not stringent [concerning this part of his body]. And even a woman is not stringent unless she is married as we have explained (see Mishnah 2 above).

Introduction Today's mishnah deals with clumps of matted hair that do not block successful immersion from occurring.

ושאינו מקפיד עליו אינו חוצץ – and for him as long as it isn’t on the majority of his body. And the legal decision regarding interposition – the majority of the body and he is stringent about it, it interposes according to the words of the Torah. A minority thereof, that is to say, if the thing that interposes is in the minority of the body even though he is stringent/he is mindful of it , it does not interpose according to the words of the Torah. But the Sages decreed that on the majority [of the body] and he is not mindful about it because of the majority that he is mindful about, and on the minority that he is mindful about also because of the majority that he is mindful about. But they did not make a decree regarding the minority that he is not mindful about because of the minority that he is mindful of, for this is the body of the decree and we hold that we make a decree on a preventive measure in order to prevent the violation of another preventive measure.

The following do not block: the matted hair of the head and of the armpits and of a man's hidden parts. These types of matted hair do not block successful immersion from occurring, in contrast with those found in yesterday's mishnah which do. Note that male pubic hair does not block immersion, whereas female pubic hair does.

Rabbi Eliezer says: it is the same with a man or a woman: if it is something which one finds annoying, it blocks; but if it is something which one does not find annoying, it does not interpose. Rabbi Eliezer issues a more egalitarian ruling. No matter the gender, if the person finds the matted hair annoying, then it blocks immersion. This same general rule is found in mishnah seven. Rabbi Eliezer differs from the other sages in that he applies it also to pubic hair.