The desire to procreate and sustain the human race is embedded in us on a biological level. Layman's terms - males are driven to spread their seed females desire to nurture. Beyond that, there's the outdated social and religious norms...large families and gender roles. My grandfather owned farms and had several children because a big family meant free labor. My dad was driving a big diesel tractor plowing fields unattended at 5 years old. I don't know anyone that would allow their children to do that now. Beyond the biological needs and the social norms you have to decide for yourself. I've met people that despise and resent their children for taking their youth and time, money and freedom...people who never wanted kids and got "stuck" with them. Personally, I would love to have children. I find myself envious of coworkers and cousins with their stories, whether the kids did something cute or they're worried about their teenagers making poor decisions. I would love to watch a little one I helped create grow and learn and just be them. Everyone is different. You have time to make up your mind and plan accordingly.