You need to wear a cup. Most infielders do - it's no fun if the ball bounces up in the dirt and catches you between the legs. I broke one cup already this season. Catchers get a lot of injuries - I am playing with a broken finger right now and I dislocated my knuckle a couple of weeks ago. The knuckle you can just pop back into place; the break you can't do anything about. I take a mild pain-killer, but not too much as I don't want to become immune.
I wear a a batting glove under my catcher's mitt to cut down the sting. On cold days I wear one about twice as thick. But if you start putting things on to protect your hands you can't throw properly. Sweat-bands on the wrist take out a bit of the sting when you're down behind home plate blocking the ball.
I lose about 20 to 25lb a season because of all the leg work, so my clothes don't always fit the same. I don't dress in any specific order; T-shirt, socks, stirrups, long-sleeve jersey, briefs which are the sliding pads, pants, protector and team jersey. My gold cross I never take off. Does it make me religious? I am to the best of my ability.
Pat Borders is the catcher for the Toronto Blue Jays, playing in the World Series against the Atlanta Braves.