YOU SAID:
I want you so bad in bed
INTO JAPANESE
私はあなたがとても悪いベッドでいてほしい
BACK INTO ENGLISH
I want you to be in a very bad bed
INTO JAPANESE
私はあなたにとても悪いベッドにいてほしいです
BACK INTO ENGLISH
I want you to be in a very bad bed
Come on, you can do better than that.