YOU SAID:
I have an erection slipping out of my underpants.
INTO JAPANESE
私は下着から勃起しています。
BACK INTO ENGLISH
I am erecting from my underwear.
INTO JAPANESE
私は下着から立っています。
BACK INTO ENGLISH
I am standing from underwear.
INTO JAPANESE
私は下着から立っています。
BACK INTO ENGLISH
I am standing from underwear.
This is a real translation party!