YOU SAID:

I stuck my pee pee into Cheerios

INTO JAPANESE

私はおしっこをチェリオスに突き刺した

BACK INTO ENGLISH

I pierced my peck into the cello

INTO JAPANESE

私は自分の頭をチェロに突き刺した

BACK INTO ENGLISH

I stabbed my cell in my cello

INTO JAPANESE

私はチェロで自分の細胞を刺した

BACK INTO ENGLISH

I stabbed my cell with a cello

INTO JAPANESE

私は自分の携帯にチェロを刺した

BACK INTO ENGLISH

I stabbed my cell phone with my cell phone

INTO JAPANESE

私は自分の携帯電話を自分の携帯電話に刺した

BACK INTO ENGLISH

I stabbed my cell phone on my cell phone

INTO JAPANESE

私は自分の携帯電話を自分の携帯電話に刺した

BACK INTO ENGLISH

I stabbed my cell phone on my cell phone