We'd like to think we're "superior" to "mere animals." But most of us are still under the whims of our animalistic nature, such as the drive to reproduce. Almost all people (even in the "most civilized" countries like the US) try to rationalize this drive with thoughts like: "I want my surname to live on." "I want a little version of me." "My parents want grandchildren." and so on. Not only do I find the "need" to produce children animalistic, but selfish as well.