Yeah, rain hurts..not the big old fat rain, but those little stinging rain drops can hurt if you dont have the proper gear on.
I like riding in the rain, its great practice, and it really makes you keep your wits about you, and your mind focused. I try to not ride when it first starts raining, since all the dirt/oil/debris rises to the top of the surface and doesnt have time to wash away, and that can be dangerously slick..but after alittle while..just keep it smooth, and you'll be fine.
Good way to keep your skills tuned, and mind focused..not that anybody should ever lose focus when your riding anyways...but, you know..
I don't leave the house on the bike if its raining.
If I'm on a trip or get caught in it, I take the extra precautions like slowing down, increasing following distance which allows more stopping distance.
Basically all the same thing I do in a cage.