Rat and Dog
Opposites do not attract.
There is a clash of values in this match and unlikely to find too much common ground.
Initially the Rat is impressed with the dog's frankness and honesty. Later finds out that the dog is inflexible and blunt.
A dog person will feel really hurt by the rat's insensitivity and selfishness as it prefers simplicity and honesty. For this match to work, it is up to the rat to create an intimate atmosphere and constant reassurance.