You shouldn't touch your coworkers.
Becca is happy that her favorite coworker is finally back from going on vacation.
Becca wants to greet and welcome the coworker back.
Becca buys her coworker her favorite coffee drink giving it to her while welcoming her back.
Becca runs up and embraces her coworker in a tight hug.
Becca has made a good impression on her coworker and maintained professionalism.
Becca may be seen as unprofessional by her work peers and boss.