My girlfriend left me, years ago, in the Holy Land. We were on a walking tour of Mt Sinai, there with other travellers, guides, and donkeys carrying food and water. It was a hard climb and my girlfriend complained about having sore feet, over and over again. She was still complaining when we reached the summit and looked around, had something to eat and drink. When looking at the descent in front of us, she started complaining again about her sore feet. All I said was "instead of complaining so much, why don't you go down on a donkey?"