Why so girls seem to like to cling to guy's arms?

Are you a girl who does this? Why? Do you feel safe or something?

Are you a guy who has this done to you? Do you like it?

I just watched a couple (Asian of that matters) almost get reamed by a truck MN because the girl was hanging onto the dudes arm and dragging him down.
Why so girls seem to like to cling to guy's arms?
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