Since this is an etiquette forum, I thought I would share a few easy ways to do the things these SS do, buttely.
Eating someone else's food: As mentioned above, we enjoy dining with fellow foodies. If you want to eat someone else's food, ask! Accept "no" for an answer. Hand them your fork or small plate. Let them decide how much to share. We tell the waiter/ress what we're going to do. Usually they offer to bring out some small plates or we'll ask. We tip well because there are more dishes to clear and clean.
Accompanying a minor child to surgery: DH has had 10 eye surgeries in the last 3 years, so I've spent a lot of time in waiting rooms. The prize for not being a SS under trying conditions goes to the mother of the autistic girl who was scheduled for major surgery (OR & anesthesia). She explained to the medical staff that her daughter was autistic and could not tolerate being touched by strangers. The nurse who was supposed to put the plastic ID bracelet on asked the mother, "OK, I need to ID her. Can you help? What can we attach this to?" The mother repeated herself patiently to the little girl, who was scared, "You'll be fine. They are here to care for you. You will be OK. They are here to help you." It was almost a chant. Every time the girl's face screwed up ready to cry, her mom was a rock. "No need to cry. They won't hurt you." Yeah, that last one was probably a lie, because it probably did hurt. Mom was dealing with the anticipated pain which was the pressing issue at that time.