Oh, yeah, never declaw. But trimming is OK - it doesn't hurt them at all, unless you mess up and hit the quick. You shouldn't be trimming too close to the quick anyway. It keeps the claws from getting too long, which sometimes can cause them pain.
My ex had a cat that actually liked getting its claws trimmed. It would stay in her lap for about a minute afterward, and then go hit the scratching post, purring all the while.