May kitty go outdoors? Does he need to wear a leash? Is there anywhere outdoors he should not be allowed to go?

Cassie says: Are you kidding me? I was an outside-only kitty the first part of my life. I am NOT going outside again. Just open the screen door and let me enjoy the fresh air from this side. I can see the birds and the sky just fine from here, thank you.
Milo says: I love to go out on the screen porch, observe my kingdom, and dig my claws into the pretty mat out there! You can come too! Bring some water for each of us to drink. Oh, and bring my kitty comb, too. We'll sit on the bench and you can comb me.