Why would anyone want a rat or mouse as a pet?

Mice are cute; rats are ugly.  And mice raised as pets are clean, loving, and easy to care for.

There is no such thing as an ugly animal.

yes i would like both

There cute, Crazy, funny, FLUFFY, and can be trained and very friendly. 

They can act like a cat or a dog  depending on their personality. 

There are many reasons why someone would want to get a pet rat or mouse. First of all, rats are incredibly intelligent animals. They can be taught to do tricks and form bonds with their owners. Also, they're quite cheap and compared to other animals, they're not all that hard to care for.

Some people think that rats are gross, but this is also not true. They spend a lot of time grooming themselves, and are clean animals.

Rats are extremely smart! They are almost as smart as a human!

Because they are so cute and convenient.  

They can be fun little pets.  They are responsive, easily trained, small sized, and clean.

They are both cute, smart, and fun to play with. They barely take up any space, easy to care for, affectonite, and surprisingly good natured,

They are cute, smart, don't take up much space, bond with people and are fairly easy to care for.