/me has a tube of KY jelly that's awesome. s'not astroglide, but you can get it @ the grocery store

be prepared to shower afterwards... things get a bit messy in my experience, and remember to pick a lube that won't degrade a condom!!
btw: from re-reading your post, it almost sounds like you're concerned about using a lubricant because it's not "natural" or as a remedy to a problem. It doesn't have to be like that. it can just be an extra layer of fun in sex. Using it doesn't mean somethings wrong with you, or that you're abnormal.
that said, if you're routenely dry, you may very well wanna hit up the gyno's office. they spend their days w/ their heads under womens skirts

they must know SOMETHING about all this
