TV series example of the word

The Big Bang Theory Season 3, Episode 7
- Hence my true purpose in coming here. - Which is?

The Big Bang Theory Season 4, Episode 4
Its size is completely disproportionate to its purpose.

The Big Bang Theory Season 5, Episode 17
Nothing that's happening here is being done on purpose.

Game of Thrones Season 1, Episode 4
but I don't quite see the purpose of this.

Game of Thrones Season 3, Episode 8
Sometimes do you talk fancy on purpose to confuse me?