A wolf and a penguin could never live together, nor could a camel and a hippopotamus. That would be absurd.
And the older you get, the fewer things you really love. And by the time you get to my age, maybe it's only one or two things. With me, I think it's one.
And one more question. Is it possible to place consul inside the walled city with 2CUs limit?
No (see 6.5, 18.1). You could retreat there though - that's probably the most common way to end up with 2CU & a consul inside a walled city.