YOU SAID:
i wear underwear in the shower
INTO JAPANESE
私はシャワーの下着を着ます
BACK INTO ENGLISH
I will wear a shower underwear
INTO JAPANESE
私はシャワー下着を着ます
BACK INTO ENGLISH
I will wear shower underwear
INTO JAPANESE
私はシャワー下着を着ます
BACK INTO ENGLISH
I will wear shower underwear
That didn't even make that much sense in English.