How do girls have more than one baby?

Honestly? I thought the pain of childbirth was so excruciating... Some people even die from it. I understand wanting a baby, but how could someone willingly go through that twice after they've already had a baby? I know they're like "it's worth it, once you have your baby, the pregnancy is the childbirth is worth it" and I get that, but it's all worth it to have the baby that you have. Why would you want to go through it again, though?
*not hating on anyone that has multiple children or saying that you shouldn't or anything like that, I just want to know how/why you can put yourself through childbirth twice. I'm terrified to even do it once, that's why I'm considering not having a baby.