The Gemara forbids relations during the day or by the light of a lamp (Niddah 17a). According to tradition, relations should take place at night and in the dark.

Why is one not allowed to have the light on when he's engaged in marital relations?

  • 1
    What resources have you checked?
    – Double AA
    Apr 8, 2015 at 21:47
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    It would help if you would tell us (for all your questions, not just this one) how you know what you know. Did you learn the g'mara on Niddah 17, or did you see a reference to this somewhere else and if so where? Apr 9, 2015 at 1:22
    – Moshe
    Apr 6, 2020 at 8:58

1 Answer 1


The Gemara there explains:

אמר רב חסדא אסור לו לאדם שישמש מטתו ביום שנאמר (ויקרא יט, יח) ואהבת לרעך כמוך מאי משמע אמר אביי שמא יראה בה דבר מגונה ותתגנה עליו

It is forbidden to have relations during the day, as the verse says "You shall love your fellow like yourself." What does this imply? (Meaning, how does that verse imply such a prohibition?) Abaye said: Perhaps he will see something disgusting about her and she will become repulsive to him.

Having relations while it is light may cause him to see something that repulses him and causes him to dislike her.

Rav Huna gives another explanation:

אמר רב הונא ישראל קדושים הם ואין משמשין מטותיהן ביום

[The people of] Israel are holy and do not have relations in the day

Rashi to Shabbos 86a explains:

דבעי צניעותא שלא יסתכלו

It requires modesty, to not look

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    Aside from the reason on Pesachim 112b (which is interesting in light of the prior context of the discussion in Niddah), there's Rav Huna's position presented in the very next line (and on Shabbat 86a)! There's more to say too about whether Rav Yochanan and Reish Lakish on the previous Ammud in Niddah are parallel, agree with or reject the positions of R Huna and R Chisda. [If you're married,] read through hebrewbooks.org/pdfpager.aspx?req=20023&st=&pgnum=59 (particularly the first two sections)
    – Double AA
    Apr 8, 2015 at 20:57

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