Let me ask you a question. Is there anything more wonderful than a hug? Two people put their arms around one another and closely hold each other. Sometimes it's quick and sometimes each holds on a long time. It feels good. It gives you a sense of security.
Mom always loved hugging and she was especially happy when she met someone who was comfortable giving a nice big bear hug. I guess I follow in her footsteps, because I sure love a nice big hug too! Who doesn't? A nice a sincere hug with no expectation of anything further can give you a big lift!
I read once that a sincere hug that lasts longer than twenty seconds can release feel-good chemicals in the brain and elevate the mood of both the giver and receiver. Sorry, but I don't recall the source of that, but even if it isn't accurate, hugging feels good and who can argue with that?