Yes. Kasi naiinhale mo ang smoke.
Let's say...
one component ng tobacco ay nicotine.
Kapag nagsmoke ka, you inhale it, get's absorbed by your lungs, tapos dadalhin sya ng dugo mo to your brain, now your brain which tells you kanina "i need a nicotine fix" have nicotine in it. When you smoke, he get's that fix. Wala na naman kasi ibang dadaluyan yun from outside to your brain kundi thru blood movement.
Now, saan nanggagaling ang breastmilk ni mommy?
Di naman po yun magic na walang pangagalingan. Syempre dugo pa rin nagsupply dun. Kung may nicotine ang dugo, for sure meron din ang breastmilk.