Idioms ¦ Whatever floats your bo

We all know that water or liquid floats boat. This idiom means that you can do whatever you like. For instance, today is your friend's birthday, if she asks you to do something for her, you can say, whatever floats your boat( or whatever flips your switch. )
Here is a conversation :
A: I want to have a dinner at Italian restaurant.
B: ok!
A: I also want to have a cake and see a movie.
B: Whatever floats your boat!