Wasting Seed / Contraception
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Mitzvah of Procreation
Er and Onan, the sons of Yehudah
Impurity from Emission of Seed
General Prohibitions
Causing one's self to have sexual thoughts: Shabbat 140b; Ketuvot 46a; Niddah 13b
Ex-communication
for one who causes himself to have sexual thoughts: Niddah 13b
One who causes himself to have sexual thoughts cannot enter into the
inner area of Gd
: Niddah 13b
It is better to have one's stomach split open, than to descend to "the well of destruction": Niddah 13b
The punishment for wasting semen: Niddah 13a
Comparing the waste of seed to
murder
and
idolatry
: Niddah 13a
Chopping off the hand of one who holds his member: Niddah 13b
Adam
creating
demonic spirits
with seed he accidentally wasted during his one hundred and thirty years of
ex-communication
: Eruvin 18b
Specific Acts
Sleeping "Perakdan" [generally assumed to mean supine]: Berachot 13b; Niddah 14a
Standing on a bed in which a couple usually sleeps: Shabbat 140b
Touching one's genitalia to check for
emission of [impure] seed
or for
[impure] genital discharge
: Niddah 13a
Holding one's member/genitalia while
urinating
: Niddah 13a-b, 16b, 43a
Masturbation is like spilling blood: Niddah 13b
Comparing masturbation to adultery: Niddah 13b
Touching one's self to remove a thorn from one's groin area: Niddah 13b
Wearing pants which are tight-fitting in the crotch: Niddah 13b
Donkey and camel riding: Niddah 14a
Contraception
Use of a blocking cloth in sexual intercourse with a minor woman because pregnancy could endanger her: Ketuvot 39a; Nedarim 35b
Use of a blocking cloth in sexual intercourse with a
pregnant woman
lest a new pregnancy endanger the existing fetus: Ketuvot 39a; Nedarim 35b
Use of a blocking cloth in sexual intercourse with a
nursing woman
, lest she stop producing milk for the current child: Ketuvot 39a; Nedarim 35b
Relying on
Divine protection for fools
in engaging in sexual relations without contraception when pregnancy would be hazardous: Ketuvot 39a
For a woman to change her position after sexual intercourse to avoid conception: Ketuvot 37a
The ineffectiveness of contraception via shifting positions after intercourse: Ketuvot 37a
Do we assume that a woman who engages in
immoral conduct
will
want to
take steps to avoid pregnancy: Ketuvot 37a
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