YOU SAID:
She's like a porcupine in bed
INTO JAPANESE
彼女はベッドの中でヤマアラシのようです
BACK INTO ENGLISH
She looks like a porcupine in bed
INTO JAPANESE
彼女はベッドの中でヤマアラシのように見えます
BACK INTO ENGLISH
She looks like a porcupine in bed
That didn't even make that much sense in English.