It may or may not be natural*, but it's counterproductive to get upset. Chances are, there's something wrong with your question that caused it to get downvoted. Review what you've written, and improve it. Not only will that increase the chance for an upvote (for what little that's worth), but you'll get better answers.

Downvotes are not a rogue attack on you, or a personal judgement. They're actual policy, [recently reinforced][1], meant to increase the quality of questions.

You might get an unwarranted downvote, every now and then. Honestly, I very rarely see that. If you get just one downvote, and there's nothing that could be improved, just shrug it off. Alternatively, if you get more than one downvote, chances are *really high* that your question is lacking in one way or another.

Most of the time, downvotes are accompanied with explanatory comments. If you've been downvoted and you don't know why, post a link here, and we might be able to help improve it, or improve future questions.

*<sub>More of a *psychologyoverflow.com* question.</sub>
  [1]: http://blog.stackoverflow.com/2010/10/asking-better-questions/