Brushing one's teeth during Yom Kippur

[Sarah]

But isn't smoking in any fast completely wrong, since you are inhaling substances that go into your bloodstream, just the way sugars from food do.

[Vito]

But isn't smoking in any fast completely wrong, since you are inhaling substances that go into your bloodstream, just the way sugars from food do.

Not only that, you're lighting a fire!

[Tzvi Ben Roshel1]

But isn't smoking in any fast completely wrong, since you are inhaling substances that go into your bloodstream, just the way sugars from food do.

Not only that, you're lighting a fire!

actually except for Yom Kippur- other fast days Jews are allowed to light fires.