YOU SAID:
when i was little i used to put my finger down the plughole
INTO JAPANESE
私が小さい頃、私はプラグホールの下に指を置いていた
BACK INTO ENGLISH
When I was little, I put my finger under the plug hole
INTO JAPANESE
私が小さかったとき、私はプラグの穴の下に私の指を置きました
BACK INTO ENGLISH
When I was small, I put my finger under the hole in the plug
INTO JAPANESE
小さい頃、プラグの穴の下に指を入れた
BACK INTO ENGLISH
When I was little, I put my finger under the plug hole
INTO JAPANESE
私が小さかったとき、私はプラグの穴の下に私の指を置きました
BACK INTO ENGLISH
When I was small, I put my finger under the hole in the plug
INTO JAPANESE
小さい頃、プラグの穴の下に指を入れた
it is unlikely that this phrase will ever reach equilibrium