I think it's more the fear that if you don't have kids, you'll regret it in the future. All of my friends who do have kids are telling me, "You need to do this! You'd be such a good parent! Everyone needs family, especially when they're older! You'll regret it if you don't!" I know that it's such a huge responsibility, and I don't want to rush into it; I'm one who weighs every single aspect of a decision before committing to it. However, I haven't got much flexibility, time-wise, left. That's the pressure.