I generally need to have an orgasm before I get really, really wet. Also there are times when I do get wet, but I usually have to watch porn before.
As a woman, our brain plays the biggest role in our sexual stimulation and satisfaction. It has been proven. There are women out there who can think themselves to orgasm. I, on the other hand, cannot orgasm with my eyes open or without a LOT of physical stimulation.
I have been using lube for a long time. At first I thought I was weird too, because my partner can get wet very easily, I even thought to ask if it were a side effect of my medication. But alas, it was just me, over thinking things!
Besides, lube is fun, you get to test out all types, scents and flavors! Have fun!