The gemarah says that to wear tefillin a person needs to have a clean body like Elisha baal kenafayim (shabbat 49a). How does the gemara know that Elisha had a clean body?
Is one allowed to spray cologne on shabbos? Any rules against doing this? As always, please cite your sources
What kinds of deodorants are mutar on shabbat? Which melacha might one violate if using stick deodorant?
What, if any, modern-day hygiene products are prohibited "oils" on Yom Kippur? Are deodorants and perfumes in this category? What about medical ointments?
May deodorant be applied on Yom Kippur, or is it a case of anointing which is forbidden?
"Just as one separates oneself from excreta, urine, a foul odor, a corpse and the sight of nakedness for Kri'at Shema, so too, he should separate himself for Shemoneh Esreh". (Rambam. Hilchos Tefillah ...