Its human instinct to reproduce but the more high level of knowledge you get the more you resist the instinct that 1 man not reproducing can make a difference. The low level of knowledge may cause a specific being to reproduce even more.
The cause of life is more than a simple human being or trying to reproduce.
BTW i lost faith in humanity thats why I tend to like animals more.

oh crap scientific answer might not be enough try to think something sassy skitz.....

Oh your girlfriend is called jenna, hmmm whats your left hand called then. Jennifer.