Do you do the same?

We also do that

depends on the situation. Sometimes at night if someone flashes their headlights it could mean you have your high brights on and you don't realize it.

As far as I knew you did that everywhere

Also to warn about potential hazards like deer nearby.

In italy as well

Us motorcyclists pat the top of our helmets. Just FYI.

I do that in the u.s

In NC, it's illegal to flash your lights with the intent to warn others about the police.

We do it in ireland

We either do that or do a slow down sign with our hand

We do it in Mauritius

Yeah in South Africa

yep

Upstate ny either deer or cops

In literally every country everybody does that

Thanks to a very good friend of mine, I now have an extremely dirty mind and thought this was talking about something entirely different. I spent 3 minutes trying to figure out how the caption pertained to two fully clothed people.

Clever

Bad habit. That means you warn drunk driving bastards and drugged out drivers. People need to learn to fucking drive by the speedlimits..