Tell me more ×  The Gemara says that if a woman gets married,
then her husband dies; then marries another guy and is widowed
from him; then once more; we then assume something about her is
causing her husbands to die (three makes a pattern). The woman
is considered a קטלנית, katlanit ("killer woman"), and should
not marry again.  The Gemara then has two possible explanations
to what's going on here:    • Whatever is going on with this
woman is metaphysical ("karma", "mazal", whatever), in which
case this halacha would apply even if the first husband died of
lightning strike, the second of shark attack, and the third of
... well, pick your favorite absurdity.   • There's something
medical/biochemical that this woman causes in her husbands. If
so, the halacha would only apply if all three died of natural
causes.  My understanding is the Gemara is saying "don't try to
over-diagnose; even if you don't understand the mechanism, if
it's consistently dangerous, stay away!"  Nonetheless, out of
curiosity, are there a