YOU SAID:
SpongeBob is not a contraceptive
INTO JAPANESE
スポンジは避妊ではないです。
BACK INTO ENGLISH
SpongeBob is not birth control.
INTO JAPANESE
スポンジは避妊ではありません。
BACK INTO ENGLISH
SpongeBob is not a contraceptive.
INTO JAPANESE
スポンジボブは避妊薬ではありません。
BACK INTO ENGLISH
SpongeBob is not a contraceptive.
That didn't even make that much sense in English.