It is sometimes possible to let a tomcat go out and attend to his toilet and his love life from an upstairs city apartment. One cat I know owns a basket with bell and stout rope attached. When he wants to go out he jumps into the basket, paws the bell until it tinkles, and his people lower him to the garden, three stories down. When he's been out long enough Chips jumps into his basket, rings the bell, and is pulled up.
Another tomcat I know solved the cat-pan problem for himself by using.
Map Of Rauris Gallery Photos
Map Of Rauris
The toilet and pulling the chain. The average of travel with cats and people is less ingenious than that, so most male travel with cats that live in apartments are gelded when they grow up.