YOU SAID:

i have a watermelon in my pants

INTO JAPANESE

私は私のズボンのスイカがあります。

BACK INTO ENGLISH

I have a watermelon in my pants.

INTO JAPANESE

私のズボンにスイカがあります。

BACK INTO ENGLISH

Watermelon in my pants.

INTO JAPANESE

私のズボンのスイカ。

BACK INTO ENGLISH

Watermelon in my pants.