It seems that most people struggle to get wet sometimes which is refreshing to know that I am not odd, well no odder than normal
I tend to count myself as being a bit odd in the fact that it takes very little to get me wet. This has been remarked on by more than one partner. I get wet just with the anticipation of my partner coming over to mine. And yes, it does lead to a lot of stained pants. Not particularly delightful but I guess I'm lucky in not needing too much lube.
I think it's fairly normal to need some help. Especially if you're on the pill.