Is this appropriate behavior?

I am a school bus driver. One of my Schools is a middle/high school together so it’s grades 6-12. One of the adult male staff (I’m guessing by the slight graying in his beard he’s mid 40’s) kisses the girls on the forehead when they hug him before they run off to their buses. It gives me weirdo vibes. Am I making a big deal of it or do you think he’s a creep. He portrays this hip, dresses like the kids cool guy image.

Is this appropriate behavior?
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