Baptists are one of several traditions that don't baptize our babies. We are credobaptists, practicing what's often called Believer's Baptism, baptism of adults by full immersion (known as the dunk, as opposed to the sprinkle).
When I was a small child, attending a non-denominational credobaptist church, I thought that I ought to be baptized because I believed in Jesus. That's what people who believe in Jesus do.
Of course, you have to have water to have a baptism, and we didn't have water.
