How is “force of habit” used?

In Suddenly, Last Summer (1959), one line is: “I almost said, "You must meet my son Sebastian." Force of habit.”

Which movie is “force of habit” from?

The clip at the top of this page is from Suddenly, Last Summer (1959).

if you do sth from or out of force of habit, you do it automatically and in a particular way because you have always done it that way in the past

Heard in 3 movies

Oxford100% of films
if you do sth from or out of force of habit, you do it automatically and in a particular way because you have always done it that way in the past
Then it was only force of habit.
It's a force of habit. You don't mind if I look around, do you?

Definitions from the Oxford Advanced Learner's Dictionary, 9th edition

I almost said, "You must meet my son Sebastian." Force of habit.

Said in 8 films · #1