YOU SAID:

Teet sucking is a thing that babies do

INTO JAPANESE

Teet しゃぶりは赤ちゃんがすることです。

BACK INTO ENGLISH

Teet sucking babies that is.

INTO JAPANESE

つまり赤ちゃん Teet しゃぶり。

BACK INTO ENGLISH

This means that baby Teet sucking.

INTO JAPANESE

つまり、赤ちゃんの Teet しゃぶり。

BACK INTO ENGLISH

In other words, that Teet baby sucking.

INTO JAPANESE

つまり、Teet 赤ちゃんしゃぶり。

BACK INTO ENGLISH

In other words, Teet sucking baby.

INTO JAPANESE

つまり、Teet しゃぶり赤ちゃん。

BACK INTO ENGLISH

In other words, Teet sucking baby.