I dont' see any problems with it. I have an aunt who loves to touch people's elbows when she talks to them. To her it's not only a way to get their undivided attention but also as a form of affection. As long as the other party don't feel uncomfortable with it it's fine. At least I don't have a problem with it

Our family members however have a problem with another aunt who makes really violent gestures with her hands when she talks... esp when she gets too animated or excited. It's a little scary cuz she will raise her voice and sometimes it gets a little intimidating and you're afraid that her hand movements will hit you. Of course we know she don't mean any harm as she's a lovely lady but it gets a little off putting at times. Natual instinct to defend