Plan B is a pill that you take after somebody cums in you to prevent a pregnancy. Since plan A is to use protection, plan B is used when, for some reason, you could not have used protection.
Even if animals in captivity did live longer (which @WallEx contradicts), wouldn’t it make more sense to think it’s because of better treatment and healthcare?
Actually, where I live there is (or at least was) a business that allowed you to buy something akin to “gasoline futures”, basically you could just buy X liters of gas or diesel and then use them up overtime using a client card or something like that. Not too sure how it worked, forgot the name too.