Purse and The Lady

I once watched this movie, I can't remember the title nor the story.
I just remember the scene, when the actor knew that his date was carrying a bomb on her purse, because he saw the lady went to the bathroom without her purse.

He said, his experience of dating had taught him that no way a lady would go to the bathroom without their purse.

I guess a girl should bring their purse to the bathroom because they need to re-apply the make up.
However, I never use make up except when I was pushed to (such as when I got to the office) so I rarely bring my purse to the bathroom.

but ever since I watched the movie, I pushed myself to took my purse wvwrytime I got to bathroom because I don't want my date to think I am so unlady like...

or worse.... carry a bomb everywhere I go