YOU SAID:

i like to poo in my pants

INTO JAPANESE

私はズボンにうんこを入れるのが好きです

BACK INTO ENGLISH

I like to put poop in my pants

INTO JAPANESE

ズボンにウンチを入れるのが好き

BACK INTO ENGLISH

I like putting poop in my pants.

INTO JAPANESE

うんこをズボンに入れるのが好きです。

BACK INTO ENGLISH

I like putting poop in my pants.