Do guys really do the 3 day rule?

I recently went on a date w/ a guy that I thought wasn’t interested (actually, I’m still pretty positive he just ‘wasn’t that into me’) but my brother insists that he’s probably doing the 3 day rule. I guess we’ll find out today or tomorrow (either or could be considered the 3rd day depending on when it actually starts in a guy’s mind). So regardless, I was astounded. Guys really do the 3 day rule? I’m pretty surprised if they actually take advice from a movie called ‘swingers’...

Do you guys out there really do the 3 day thing?