If someone wants to smoke tobacco, then should they be allowed to do so? Yes.
Should they be allowed to rob you to satisfy their tobacco addiction? No.
But their body, their choice? Unless we accept that bodily autonomy is worth less than $8 for a pack of tobacco, and therefore, worth less than a baby's life (because a baby's life is worth more than $8).
If a woman doesn't want pregnancy, then she should make sure her bf has a vasectomy before they have sex.
I'm anti-abortion (I think abortion should be punished with community service) and I'm getting a vasectomy before I have sex with any woman that can get pregnant.