Dear Gecko …
… of course you’re welcome in our house. Because you are quiet, you don’t expect us to open cans with gecko food for you, you fight the mosquitos and flies and spiders and all those pests.
Buuut! Don’t you dare crapping all over the place. The mess you and your friends are creating on the outside walls is already fugly enough. Don’t pull any stunts inside my home office and you might stay as long as you like. But the instant I find your first dropping on any of our inside walls you’ll get hunted into oblivion! =^.^=