When I lived in a small town in Texas, I put in a gas line to my pool heater. Ran the line to the meter, disconnected the line from the meter to the house and T-ed the line in. I was trying to reconnect the union but was having problems getting it aligned.
A plumber friend of mine came along, stopped his truck and asked if I was having problems. I told him I was having trouble getting the fitting started to connect the union. He said, "I can fix that for you". He went back to his truck, got a couple of wrenches and proceeded to make it look easy.
I thanked him, and he said, "No problem". I was thinking how nice it was to have friends who could help when I needed it. Next week I got his bill for $45.