I recently underwent brachytherapy where they implanted radioactive pellets into my prostate. Since there is a possibility of a pellet being emitted during marital relations, it is recommended to use a condom the first few times. Is this permitted halachically?
Yes, if you make a tiny whole at the end with a needle or pin.
I would like to know whether and how a Jew should help a gentile holeh she-yesh bo sakkana or holeh she-ein bo sakkana during Shabbat